Every mode of explanation which does not shew us this possibility, although in appearance may be similar to ours, can with the utmost
certainty
be distinguished from by these marks.
Kant - Critique of Pure Reason
--to be soou convinced that ttiey form e science of pure physics {phyrica pur a, or rationalis), which well deserves to ha separately exposed as a special science, in its whole extent, whether thai be (rr<<n' or confined.
? ? ? u INTBODtJCTIOlT.
of metaphysics. It will always exist, so soon as reason awake* to the exercise of its power of speculation. And now the question arises -- How is metaphysics, as a natural disposition, possible ? In other words, how, from the nature of universal human reason, do those questions arise which pure reason proposes to itself, and which it is impelled by its own feeling
af need to answer as well as it can ?
But as in all the attempts hitherto made to answer the ques
tions which reason is prompted by its very nature to propose to itself, for example, whether the world had a beginning, or has existed from eternity, it has always met with unavoidable contradictions, we must not rest satisfied with the mere natu ral disposition of the mind to metaphysics, that with the existence of the faculty of pure reason, whence, indeed, some sort of metaphysical system always arises; but must be possible to arrive at certainty in regard to the question whether we know or do not know the things of which metaphysics treats. We must be able to arrive at decision on the subjects of its questions, or on the ability or inability of reason to form'
any judgment respecting them and therefore either to extend with confidence the bounds of our pure reason, or to set strictly defined and safe limits to its action. This last ques tion, which arises out of the above universal problem, would properly run thus How metaphysics possible as science
Thus, the critique of reason leads at last, naturally and necessarily, to science and, on the other hand, the dogma tical use of reason without criticism leads to groundless asser tions, against which others equally specious can always be set, thus ending unavoidably in scepticism.
Besides, this science cannot be of great and formidable prolixity, because has not to do with objects of reason, the variety of which inexhaustible, but merely with reason her self and her problems problems whieh arise out of her own bosom, and are not proposed to her the nature of outward 'things, but her own nature. And when once reason has previously become able completely to understand her own
power in regard to objects which she meets with in experience, will be easy to determine securely the extent and limits of
her attempted application to objects beyond the confines
? experience. mini, therefore, We may anJ
regard
the hitherto attempts
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made; to establish metaphysical science dogmatically as non existent. For what of analysis, that mere dissection of
contained in one or other, not the aim of, but only preparation for metaphysics proper, which has for its object the extension, by means of synthesis, of our a priori knowledge. And for this purpose, mere analysis of course useless, because only shews what contained in these conceptions, but not how we arrive, a priori, at them; and this her duty to shew, in order to be able afterwards to determine their valid use in regard to all objects of expe rience, to all knowledge general. But little self-denial, indeed, needed to give up these pretensions, seeing the undeniable, and in the dogmatic mode of procedure, in evitable contradictions of Reason with herself, have long since ruined the reputation of every system of metaphysics that has appeared up to this time. will require more firmness to remain undeterred by difficulty from within, and opposition from without, from endeavouring, method quite opposed to all those hitherto followed, to further the growth and fruitfulness of science indispensable to human reason -- science from which every branch has borne may be cut away, but whose roots remain indestructible.
VII. Idea and division of a pabticitlab science, ttnden THE NAME OF A CRITIQUE OF PuBE REASON.
From all that has been said, there results the idea of par ticular science, which may be called the Critique of Pvre Reason. For reason the faculty which furnishes us with the principles of knowledge priori. Hence, pure reason
the faculty which contains the principles of cognizing any thing absolutely priori. An Organon of pure reason would be a compendium of those principles according to which alone all pure cognitions priori can be obtained. The completely extended application of such an organon would afford us system of pure reason. As this, however, de manding great deal, and yet doubtful whether any extension of our knowledge be here possible, or so, in what cases we can regard science of the mere criticism of pure reason, its sources and limits, as the propcedeutie to ? yBtem of pure reason. Such science must not be called Doctrine, but only Criticie of pure Reason and iu use,
conceptions,
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? l<< INTRODUCTION
in regard to speculation, would be only negative, hot to en large the bounds of, but to purify our reason, and to shield it against error, --which alone is no little gain. I apply the term transcendental to all knowledge which is not so much occu pied with objects as with the mode of our cognition of these objects, so far as this mode of cognition is possible a priori. A system of such conceptions would be called Transcendental Philosophy. But this, again, is still beyond the bounds of our present essay. For as such a science must contain a complete exposition not only of our synthetical a priori, but of our analytical & priori knowledge, it is of too wide a range for our present purpose, because we do not require to carry our analysis any farther than is necessary to understand, in their full extent, the principles of synthesis a priori, with which alone we have to do. This investigation, which we cannot properly call a doctrine, but only a transcendental critique, because it aims not at the enlargement, but at the correction and guidance of our knowledge, and is to serve as a touchstone of the worth or worthlessness of all know ledge a priori, is the sole object of our present essay. Such a critique is consequently, as far as possible, a preparation for an organon ; and if this new organon should be found to fail, at least for a canon of pure reason, according to which the complete system of the philosophy of pure reason, whether it extend or limit the bounds of that reason, might one day be set forth both analytically and synthetically. For that this is possible, nay, that such a system is not of so great extent as to preclude the hope of its ever being com
is evident. For we have not here to do with the nature of outward objects, which is infinite, but solely with the mind, which judges of the nature of objects, and, again, with the mind only in respect of its cognition & priori. And the object of our investigations, as it is not to be sought without, but altogether within ourselves, cannot remain con cealed, and in all probability is limited enough to be com pletely surveyed and fairly estimated, according to its worth or worthlessness. Still less let the reader here expect a critique of books and systems of pure reason ; our present object is exclusively a critique of the faculty of pure reason itself. Only when we make this critique our foundation, do we possess a pure touchstone for estimating the philosophical
? pleted,
? ? ? IDEA OF A UKITMiDl
OF PUKE HEA. SOIT. 17
value of ancient and modern writings on this subject; and without this criterion, the incompetent historian or judge decides upon and corrects the groundless assertions of others with his own, which have themselves just as little foundation.
Transcendental philosophy is the idea of a science, for
which the Critique of Pure Reason must sketch the whole
plan architectonically, that from principles, with full
guarantee for the validity and stability of all the parts which
enter into the building. the system of all the principles
of pure reason. If this Critique itself does not assume the
title of transcendental philosophy, only because, to be
complete system, ought to contain full analysis of all
human knowledge a priori. Our critique must, indeed, lay
before us complete enumeration of all the radical concep
tions which constitute the said pure knowledge. But from
the complete analysis of these conceptions themselves, as
also from complete investigation of those derived from
them, abstains with reason partly because would he
deviating from the end in view to occupy itself with this
analysis, since this process not attended with the difficulty
and insecurity to be found in the synthesis, to which our
critique entirely devoted, and partly because would be
inconsistent with the unity of our plan to burden this essay
with the vindication of the completeness of such an analysis
and deduction, with which, after all, we have at present
nothing to do. This completeness of the analysis of these radical conceptions, as well as of the deduction from the
? a priori which may be given the analysis, we can, however, easily attain, provided only that we are in pos session of all these radical conceptions, which are to serve as principles of the synthesis, and that in respect of tills main purpose nothing wanting.
To the Critique of Pure Reason, therefore, belongs all that constitutes transcendental philosophy and the complete idea of transcendental philosophy, but still not the science itself oecause only proceeds so far with the analysis as necessary to the power of judging completely of our syn thetical knowledge a priori.
The principal thing we must attend to, in the division of the parts of science like this, that no conceptions must tnter which contain aught empirical other words, that
conceptions
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? 18
INTROUUCTION.
the knowledge i prion" must be completely pure. Hence, although the highest principles and fundamental conceptions of morality are certainly cognitions & priori, yet they do not belong to transcendental philosophy ; because, though they certainly do not lay the conceptions of pain, pleasure, desires, inclinations, &c. , (which are all of empirical origin) at the foundation of its precepts, yet still into the conception of duty, --as an obstacle to be overcome, or as an incitement which should not be made into a motive, --these empirical conceptions must necessarily enter, in the constiuction of a system of pure morality. Transcendental philosophy is con sequently a philosophy of the pure and merely speculative reason. For all that is practical, so far as it contains mo tives, relates to feelings, and these belong to empirical sources of cognition.
If we wish to divide this science from the universal point of view of a science in general, it ought to comprehend, first, a Doctrine of the Elements, and, secondly, a Doctrine of tht Method of pure reason. Each of these main divisions will have its subdivisions, the separate reasons for which we cannot here particularise. Only so much seems necessary, by way of introduction or premonition, that there are two sources of human knowledge (which probably spring from a common, but to us unknown root), namely, sense and under standing. By the former, objects are given to us ; by the latter, thought. So far as the faculty of sense may contain representations h priori, which form the conditions under which objects are given, in so far it belongs to transcendental
? The transcendental doctrine of sense must form the first part of our science of elements, because the con ditions under which alone the objects of human knowledge are givea, must precede those under which they are thought.
philosophy.
? ? ? ? OF PURE REASON.
TRANSCENDENTAL DOCTRINE OF ELEMENTS.
CRITIQUE
? ? ? TRANSCENDENTAL DOCTRINE OF ELEMENTS. PART FIRST.
TRANSCENDENTAL ESTHETIC.
? 1. Introductory.
In whatsoever mode, or by whatsoever means, our know ledge may relate to objects, it is at least quite clear, that the only manner in which it immediately relates to them, is by means of an intuition. To this as the indispensable ground work, all thought points. But an intuition can take place >>nly in so far as the object is given to us. This, again, is only possible, to man at least, on condition that the object affect the mind in a certain manner. The capacity for receiving re presentations (receptivity) through the mode in which we are affected by objects, is called sensibility. By means of sensi bility, therefore, objects are given to us, and it alone furnishes us with intuitions ; by the understanding they are thought, and from it arise conceptions. But all thought must directly, ' r indirectly, by means of certain signs, relate ultimately to intuitions ; consequently, with us, to sensibility, because in no other way can an object be given to us.
The effect of an object upon the faculty of representation, sc far as we are affected by the said object, is sensation. That sort of intuition which relates to an object by means of sensa tion, is called an empirical intuition. The undetermined ob
ject of an empirical intuition, is called phenomenon. Thnt which in the phenomenon corresponds to the sensation, I term its matter ; but that which effects that the content of the pheno menon can be arranged under certain relations, I call its form. But that in which our sensations are merely arranged, and by which they are susceptible of assuming a certain form, can not be itself sensation. It is then, the matter of all pbeno- mena that is given to us h posteriori ; the form must lie ready i priori for them in the mind and consequently can be re garded separately from all sensation.
? ? ? ? 22 TRANSCENDENTAL JS8THETI0.
I call all representations pure, in the transcendental n lean ing of the word, wherein nothing is met with that belongs to sensation. And accordingly we find existing in the mind << priori, the pure form of sensuous intuitions in general, in which all the manifold content of the phenomenal world ii nrranged and viewed under certain relations. This pure form of sensibility I shall call pure intuition. Thus, if I take away from our representation of a body, all that the under standing thinks as belonging to as substance, force, divisi bility, &c. , and also whatever belongs to sensation, as impe netrability, hardness, colour, &c. yet there still something left us from this empirical intuition, namely, extension and shape. These belong to pure intuition, which exists priori
in the mind, as mere form of sensibility, and without any real object of the senses or any sensation.
The science of all the principles of sensibility priori, call Transcendental JEsthetic. * There must, then, be such science, forming the first part of the transcendental doctrine of elements, in contradistinction to that part which contains the principles of pure thought, and which called transcen dental logic.
In the science of transcendental esthetic accordingly, we shall first isolate sensibility or the sensuous faculty, by sepa rating from all that annexed to its perceptions by the conceptions of understanding, so that nothing be left but em pirical intuition. In the next place we shall take away from this intuition all that belongs to sensation, so that nothing may remain but pure intuition, and the mere form of phaj-
* The Germans are the only people who at present use this word to indicate what others call the critique of taste. At the foundation of this term lies the disappointed hope, which the eminent analyst, Baum- garten, conceived, of subjecting the criticism of the beautiful to principles of reason, and so of elevating its rules into science. But his endeavours were vain. For the said rules or criteria are, in respect to their chief sources, merely empirical, consequently never can serve as determinate laws priori, by which our judgment in matters of taste to be directed.
rather our judgment which forms the proper test as to the correct ness of the principles. On this account advisable to give up the use of the term as designating the critique of taste, and to apply solely to that doctrine, which true scieLce,-- the science of the laws of sensibility -- and thus come nearer to the language and the sense of the ancients in their well-known division of the objects of cognition into m'oSi;ra icai vonra or to share with speculative philosophy, and emilloj partly in tran scendental. uartlY in psvcholnsicr. l signification.
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? JlETAPHrSIOAL EXPOSITION OF 8PACB, 2. ')
nomsna, which is all that the sensibility can afford a priori. From this investigation it will be found that there are two ore forms of sensuous intuition, as principles of knowledge
priori, namely, space and time. To the consideration of these we shall now proceed.
SECTION I. OF SPACE.
? 2. Metaphysical Exposition of this Conception.
Bx means of the external sense (a property of the mind), we represent to ourselves objects as without us, and these all in space. Therein alone are their shape, dimensions, and rela tions to each other determined or determinable. The internal sense, by means of which the mind contemplates itself or its internal state, gives, indeed, no intuition of the soul as an object ; yet there is nevertheless a determinate form, under which alone the contemplation of our internal state is pos sible, bo that all which relates to the inward determinations of the mind is represented in relations of time. Of time we cannot have any external intuition, any more than we can have an internal intuition of space. What then are time and space ? Are they real existences I Or, are they merely relations or de terminations of things, such however, as would equally belong to these things in themselves, though they should never become objects of intuition ; or, are they such as belong only to the form of intuition, and consequently to the subjective consti tution of the mind, without which these predicates of time and space could not be attached to any object ? In order to become informed on these points, we shall first give an expo sition of the conception of space. By exposition, I mean the
clear, though not detailed, representation of that which belongs to a conception ; and an exposition is metaphysical, when it contains that which represents the conception as given a priori.
1. Space is not a conception which has been derived from outward experiences. For, in order that certain sen sations may relate to something without me, (that to something which occupies different part of space from that
which am) in like manner, in order that may represent them not merely as without of and near to each other, but also in separate places, the representation of space must alreudj
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exist as a foundation. Consequently, the representation of space cannot be borrowed from the relations of external phe
nomena through experience ; but, on the contrary, this ex ternal experience is itself only possible through the said ante cedent representation.
2. Space then is a necessary representation & priori, which serves for the foundation of all external intuitions. We never can imagine or make a representation to ourselves of the non existence of space, though we may easily enough think that no objects are found in it. It must, therefore, be considered as the condition of the possibility of phenomena, and by no means as a determination dependent on them, and is a repre sentation & priori, which necessarily supplies the basis for external phenomena.
3. Space is no discursive, or as we say, general conception of the relations of things, but a pure intuition. For in the first place, we can only represent to ourselves one space, and when we talk of divers spaces, we mean only parts of one and the same space. Moreover these parts cannot antecede this one all-embracing space, as the component parts from which the aggregate can be made up, but can be cogitated only as existing in it. Space is essentially one, and multiplicity in
consequently the general notion of spaces, of this or that space, depends solely upon limitations. Hence follows that an priori intuition (which not empirical), lies at the root of nil our conceptions of space. Thus, moreover, the principles of geometry, -- for example, that " in triangle, two sides together are greater than the third," are never deduced from general conceptions of line and triangle, but from in tuition, and this priori, with apodeictic certainty.
4. Spnce represented as an infinite given quantity. Now every conception must indeed be considered . u representa tion which contained in an infinite multitude of different
possible representations, which, therefore, comprises these under itself but no conception, as such, can be so conceived, as contained within itself an infinite multitude of representations. Nevertheless, space so conceived of, for all parts of space ire equally capable of being produced to infinity. Conse quently, the original representation of space an intuition a priori, and not conception
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TBAN8CENDENTAL
EXPOSITION OF SPACE.
i 3. Transcendental exposition of the conception of Space.
By a transcendental exposition, I mean the explanation of a conception, as a principle, whence can be discerned the possi bility of other synthetical a priori cognitions. For this pur pose, it is requisite, firstly, that such cognitions do really flow from the given conception ; and, secondly, that the said cog nitions are only possible under the presupposition of a given mode of explaining this conception.
Geometry is a science which determines the properties of space synthetically, and yet & priori. What, then, must be our representation of space, in order that such a cognition of it may be possible ? It must be originally intuition, for from a mere conception, no propositions can be deduced which go out beyond the conception,* and yet this happens in geometry.
But this intuition must be found in the mind ipriori, that before any perception of objects, consequently must be pure, not empirical, intuition. For geometrical prin ciples are always apodeictic, that united with the conscious ness of their necessity, as, '* Space has only three dimen sions. " But propositions of this kind cannot be empirical judgments, nor conclusions from them. (Introd. II. ) Now, how can an external intuition anterior to objects themselves, and in which our conception of objects can be determined a priori, exist in the human mind? Obviously not otherwise than in so far as has its seat in the subject only, as the formal capacity of the subject'sbeing affected objects, and thereby of obtaining immediate representation, that intuition con sequently, only as the form, the external sense general.
Thus only means of our explanation that the pos sibility of geometry, as synthetical science priori, becomes comprehensible.
Every mode of explanation which does not shew us this possibility, although in appearance may be similar to ours, can with the utmost certainty be distinguished from by these marks.
4. Conclusion* from the foregoing conceptions.
(a) Space does not represent any property of objects as
? That is, the analysis of conception only gives you what contained and does not add to your knowledg: of the object of wliich j-1u
have concqtion, but merely evolve* it. -- TV.
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? 26 THANSCENDENTAL -F. STHETIC.
things in themselves, nor does it represent them in their rela tions to each other ; in other words, space does not represent to us any determination of objects such as attaches to the ob jects themselves, and would remain, even though all subjective conditions of the intuition were abstracted. For neither abso lute nor relative determinations of objects can be intuited prior to the existence of the things to which they belong, and therefore not b) priori.
(b) Space is nothing else than the form of all phenomena of the external sense, that the subjective condition of the sensi bility, under which alone external intuition possible. Now, oecause the receptivity or capacity of the subject to be affected
objects necessarily antecedes all intuitions of these objects, easdy understood how the form of all phenomena can be
given in the mind previous to all actual perceptions, there fore priori, and how as pure intuition, in which all objects must be determined, can contain principles of the relations of these objects prior to all experience.
therefore from the human point of view only that we
can speak of space, extended objects, &c. If we depart from the subjective condition, under which alone we can obtain external intuition, or, in other words, by means of which we are affected by objects, the representation of space has nc meaning whatsoever. This predicate [of space] only appli cable to things in so far as they appear to us, that are objects of sensibility. The constant form of this receptivity, which we call sensibility, necessary condition of all rela tions in which objects can be intuited as existing without us, and when abstraction of these objects made, pure intuition, to which we give the name of space. clear that we can not make the special conditions of sensibility into conditions of the possibility of things, but only of the possibility of their existence as far as they are phenomena. And so we may correctly say that space contains all which can appear to us externally, but not all things considered as things them selves, be they intuited or not, or by whatsoever subject one will. As co the intuitions of other thinking beings, we can not judge whether they are or are not bound by the same conditions which limit our own intuition, and which for us are universally valid. If we join the limitation of judgment to the conception of the subject, then the judgment will po<<
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? OF SPACE. -- CONCLUSIONS TOM THE FOREWOINO. 27
sess unconditioned validity. For example, the proposition, "All objects are beside each other in space," is valid only under the limitation that these things are taken as objects of our sensuous intuition. But if I join the condition to the con ception, and say, " all things, as external phenomena, are be side each other in space," then the rule is valid universally, and without any limitation. Our expositions, consequently, teach the reality e. the objective validity) of space in re gard of all which can be presented to us externally as object, and at the same time also the ideality of space in regard to objects when they are considered means cf reason as things in themselves, that without reference to the constitution of our sensibility. We maintain, therefore, the empirical reality of space in regard to all possible external experience, although we must admit its transcendental ideality in other words, that nothing, so soon as we withdraw the condition upon
which the possibility of all experience depends, and look upon space as something that belongs to things in themselves.
But, with the exception of space, there no representation, subjective and referring to something external to us, which could be called objective prion. For there are no other
subjective representations from which we can deduce syn thetical propositions priori, as we can from the intuition of space. (See 3. ) Therefore, to speak accurately, no ideality whatever belongs to these, although they agree in this respect with the representation of space, that they belong merely to the subjective nature of the mode of sensuous perception such mode, for example, as that of sight, of hearing, and of feeling, by means of the sensations of colour, sound, and heat, but which, because they are only sensations, and not intuitions, do not of themselves give us the cognition of any object, least of all, an a priori cognition. My purpose, in the above remark, merely this to guard any one against illus-
trating the asserted ideality of space by examples quite insuffi
cient, for example, by colour, taste, &c. for these must be con
templated not as properties of things, but only as changes in the subject, changes which may be different in different men. For
such case, that which originally mere phenomenon, rose, for example, taken by the empirical understanding for
thing in itself, though to every different eye, in respect of its colour, may appear different. On the contrary, -tbo
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transcendental conception of pbsenomena admonition, that, genera! , nothing which thing in itself, and that space not
space critical intuited apace form which be
longs as property to things but that objects are quite unknown to us in themselves, and what we call outward ob jects, are nothing else but mere representations of our sensi bility, whose form space, but whose real correlate, the tiling in itself, not known by means of these representa tions, nor ever can be, but respecting which, in experience, no inquiry ever made.
SECTION II. OF TIME.
5. Metaphysical exposition this conception.
Time not an empirical conception. For neither co existence nor succession would be perceived us, the re
? of time did not exist <<s foundation
Without this presupposition we could not represent to our selves that things exist together at one and the same time, or at different times, that contemporaneously, or succession.
2. Time necessary representation, lying at the found ation of all our intuitions. With regard to phenomena general, we cannot think away time from them, and represent them to ourselves as out of and unconnected with time, bul we can quite well represent to ourselves time void of pheno mena. Time therefore given priori. In alone aL reality of phenomena possible. These may all be annihilated in thought, but time itself, as the universal condition of their possibility, cannot be so annulled.
3. On this necessity priori, also founded the possibility of apodeictic principles of the relations of time, or axioms of time in general, such as, " Time has only one dimension," " Different times are not co-existent but successive," (as dif ferent spaces are not successive but co-existent). ' These principles cannot be derived from experience, for would give neither strict universality, nor apodeictic certainty. We should Dnly be able to say, " so common experience teaches us," but not must be so. They are valid as rules, through which,
general, experience possible; and they instruct us respect ing experience, and not means of it.
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4. Time is not a discursive, or as it is called, general con ception, but a pure form of the sensuous intuition. Different times are merely parts of one and the same time. But the representation which can only be given by a single object is an intuition. Besides, the proposition that different times can not be co-existent, could not be derived from a general con ception. For this proposition is synthetical, and therefore cannot spring out of conceptions alone. It is therefore con tained immediately in the intuition and representation of time.
5. The infinity of time signifies nothing more than that every determined quantity of time is possible only through limitations of one time lying at the foundation. Consequently, the original representation, time, must be given as unlimited. But as the determinate representation of the parts of time and of every quantity of an object can only be obtained by limitation, the complete representation of time must not be furnished by means of conceptions, for these contain only partial representations. Conceptions, on the contrary, must have immediate intuition for their basis.
? 6. Transcendental exposition of the conception of lime.
I may here refer to what is said above (? 5, 3), where, for the sake of brevity, I have placed under the head of metaphy sical exposition, that which is properly transcendental. Here I shall add that the conception of change, and with it the conception of motion, as change of place, is possible only through and in the representation of time ; that if this re presentation were not an intuition (internal) h priori, no con ception, of whatever kind, could render comprehensible the possibility of change, in other words, of a conjunction of contra dictorily opposed predicates in one and the same object, for ex ample, the presence of a thing in a place and the non-presence of the same thing in the same place. It is only in time, that it is possible to meet with two contradictorily opposed deter
minations in one thing, that after each other. * Thus our conception of time explains the possibility of so much syn-
Kant's meaning You cannot affirm and deny the tame thing of subject, except by means of the representation, time. No other idea, intuition, or conception, or whatever other form of thought there to an mediate the connection of such predicates. -- TV
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thetical knowledge a priori, as is exhibited in the general doctrine of motion, which is not a little fruitful.
? 7. Conclusions from the above conceptions.
(a) Time is not something which subsists of itself, or which inheres in things as an objective determination, and therefore remains, when abstraction is made of the subjective conditions of the intuition of things. For in the former case, it would be something real, yet without presenting to any power of perception any real object. In the latter case, as an order or determination inherent in things themselves, it could not be antecedent to things, as their condition, nor discerned or intuited by means of synthetical propositions a priori. But all this is quite possible when we regard time as merely the subjective condition und<<"r which all our intuitions take place. For in that case, this form of the inward intuition can be represented prior to the objects, and consequently a priori.
(b) Time is nothing else than the form of the internal sense, that of the intuitions of self end of our internal state. For time cannot be any determination cf outward phsenomena.
has to do neither with shape nor position on the contrary, determines the relation of representations in our internal state. And precisely because this internal intuition presents
to us no shape or form, we endeavour to supply this want analogies, and represent the course of time line pro gressing to infinity, the content of which constitutes series which only of one dimension and we conclude from the properties of this line as to all the properties of time, with this single exception, that the parts of the line are co-existent, whilst those of time are successive. From this clear also that the representation of time itself an intuition, because all its relations can be expressed in an external tuition.
(<r) Time the formal condition o priori of all phenomena whatsoever. Space, as the pure form of external intuition, limited as condition a priori to external phsenomena
? alone. On the other hand, because all representations, whether they have or have not external things for their ob jects, still in themselves, ns determinations of lie niiud, belong to our internal state and because this internal state
subject to the formal condition of the internal intuition, that
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? OV TTMB. -- CONCLUSIONS FROM THE FOBESOtJfG.
31
to time, --time is a condition h priori of all phenomena what soever -- the immediate condition of all internal, and thereby the mediate condition of all external phenomena. If I can sny a priori, " all outward phenomena are in space, and de termined a priori according to the relations of space," I can also, from the principle of the internal sense, affirm univer sally, " all phenomena in general, that all objects of the senses, are in time, and stand necessarily in relations of time. "
If we abstract our internal intuition of ourselves, and all external intuitions, possible only by virtue of this internal
intuition, and presented to us our faculty of representation, and consequently take objects as they are in themselves, then time nothing. only of objective validity in regard to phenomena, because these are things which we regard as ob jects of our senses. no longer objective, we make ab straction of the sensuousness of our intuition, in other words, of that mode of representation which peculiar to us, and speak of things in general. Time therefore merely sub jective condition of our (human) intuition, (which always sensuous, that so far as we are affected by objects,) and in itself, independently of the mind or subject, nothing. Nevertheless, in respect of all phenomena, consequently of all things which come within the sphere of our experience, necessarily objective. We cannot say, "all things are in time," because in this conception of things in general, we abstract and make no mention of any sort of intuition of
But this the proper condition under which time belongs to our representation of objects. If we add the condition to the conception, and say, " all things, as phe nomena, that objects of sensuous intuition, are time," then the proposition has its sound objective validity and universality
prion.
What we have now set forth teaches, therefore, the empirical
reality of time that is, its objective validity in reference to
all objects which can ever be presented to our senses. And Ma our intuition is always sensuous, no object ever can be pre sented to us in experience, which does not come under the conditions of time. On the other hand, we deny to time all claim to absolute reality that we deny that without having regard to the form of our sensuous intuition, absolutely inheres in things as condition or property. Such properties
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? 82 TRANSCENDENTAL . ESTHETIC.
as belong to objects as things in themselves, never can be presented to us through the medium of the senses. Herein consists, therefore, the transcendental ideality of time, according to which, if we abstract the subjective conditions of sensuous intuition, it is nothing, and cannot be reckoned as subsisting or inhering in objects as things in themselves, independently of its relation to our intuition. This ideality, like that of space, is not to be proved or illustrated by fallacious analogies with sensations, for this reason, --that in such arguments or illustrations,we make the presupposition that the phenomenon, in which such and such predicates inhere, has objective reality, while in this case we can only find such an objective reality as is itself empirical, that is, regards the object as a mere phenomenon. In reference to this subject, see the remark in Section I. (p. 27).
? 8. Elueidation.
Against this theory, which grants empirical reality to time, but denies to it absolute and transcendental reality, I have hear:! from intelligent men an objection so unanimously urged, that I conclude that it must naturally present itself to every reader to whom these considerations are novel. It runs thus : " Changes are real ;" (this the continual change in our own representations demonstrates, even though the existence of ail external phsenomeua, together with their changes, is denied). Now, changes are only possible in time, and therefore time must be something real. But there is no difficulty in answer ing this. I grant the whole argument. Time, no doubt, is something real, that the real form of our internal intuition. therefore has subjective reality, in reference to our internal experience, that have really the representation of time, and of my determinations therein. Time, therefore,
not to be regarded as an object, but as the mode of repre sentation of myself as an object. But could intuite my self, or be intuited another being, without this condition of sensibility, then those very determinations which we now represent to ourselves as changes, would present to us knowledge in which the representation of time, and conse quently of change, would not appear. The empirical realit'y of time, therefore, remains, as the condition of all our expe rience. But absolute realify, accorJing tn what has bven
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? 01 SfACZ AHD TIME. --ELTCIDATOBT. REMARK8. 83
(aid above, cannot be granted it. Time is nothing but the form of our internal intuition. * If we take away from it the special condition of our sensibility, the conception of tira also vanishes ; and it inheres not in the objects themselves, but solely in the subject (or mind) which intuites them.
But the reason why this objection is so unanimously brought against our doctrine of time, and that too by disputants who cannot start any intelligible arguments against the doc trine of the ideality of space, is this, --they have no hope of demonstrating apodeictically the absolute reality of space, be cause the doctrine of idealism is against them, according to which the reality of external objects is not capable of any strict proof. On the other hand, the reality of the object of our internal sense (that is, myself and my internal state) is clear immediately through consciousness. The former --exter nal objects in space -- might be a mere delusion, but the latter -- the object of my internal perception -- is undeniably real. They do not, however, reflect that both, without question of their reality as representations, belong only to the genus phe- nomeuon, which has always two aspects, the one, the object considered as a thing in itself, without regard to the mode of intuiting and the nature of which remains for this very reason problematical, the other, the form of our intui tion of the object, which must be sought not in the object as thing itself, but the subject to which appears, -- which form of intuition nevertheless belongs really and neces
sarily to the phenomenal object.
Time and space are, therefore, two sources of knowledge,
from which, priori, various synthetical cognitions can be drawn. --Of this we find striking example in the cognitions of space and its relations, which form the foundation of pure ma thematics. --They are the two pure forms of all intuition, and thereby make synthetical propositions a priori possible. But these sources of knowledge being merely conditions of our sensibility, do therefore, and as such, strictly determine their own range and purpose, in that they do not and cannot present
can indeed >ay " my representations follow one aoother, or an successive" but this means only that we are conscious of tbrm as in succession, that is, according to the form of the internal sense. Time, therefore, not thing in itself, nor any objective determination nertaining to, or inherent things.
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? 34 TRANSCENDENTAL JESTHETIC.
objects as things in themselves, but are applicable to them solely in so far as they are considered as sensuous pheno mena. The sphere of phenomena is the only sphere of their validity, and if we venture out of this, no further objective use can be made of them. For the rest, this formal reality of time and space leaves the validity of our empirical know ledge unshaken ; for our certainty in that respect is equally firm, whether these forms necessarily inhere in the things themselves, or only in our intuitions of them. On the other hand, those who maintain the absolute reality of time and space, whether as essentially subsisting, or only inhering, as modifications, in things, must find themselves at utter variance with the principles of experience itself. For, if they decide for the first view, and make space and time into substances, this being the side taken by mathematical natural philosophers, they must admit two self-subsisting nonentities, infinite and eternal, which exist (yet without there being any thing real) for the purpose of containing in themselves every thing that is real. If they adopt the second view of inherence, which is preferred by some metaphysical natural philosophers, and regard space and time as relations (contiguity in space or suc cession in time), abstracted from experience,
? though repre sented confusedly in this state of separation, they find them selves in that case necessitated to deny the validity of mathe
matical doctrines &, priori in reference to real things (for example, in space), --at all events their apodeictic cer tainty. For such certainty cannot be found in an it posteriori proposition ; and the conceptions ct priori of space and time are, according to this opinion, mere creations of the ima gination,* having their source really in experience, inasmuch as, out of relations abstracted from experience, imagination has made up something which contains, indeed, general statements of these relations, yet of which no application can be made without the restrictions attached thereto by nature. 'The former of these parties gains this advantage, that they keep the sphere of phenomena free for mathematical science. On the other hand, these very conditions (space and time) embarrass them greatly, when the understanding endeavours
? This word is hpre uNd, and will be hereafter always used, in its prraii. live tense.
? ? ? u INTBODtJCTIOlT.
of metaphysics. It will always exist, so soon as reason awake* to the exercise of its power of speculation. And now the question arises -- How is metaphysics, as a natural disposition, possible ? In other words, how, from the nature of universal human reason, do those questions arise which pure reason proposes to itself, and which it is impelled by its own feeling
af need to answer as well as it can ?
But as in all the attempts hitherto made to answer the ques
tions which reason is prompted by its very nature to propose to itself, for example, whether the world had a beginning, or has existed from eternity, it has always met with unavoidable contradictions, we must not rest satisfied with the mere natu ral disposition of the mind to metaphysics, that with the existence of the faculty of pure reason, whence, indeed, some sort of metaphysical system always arises; but must be possible to arrive at certainty in regard to the question whether we know or do not know the things of which metaphysics treats. We must be able to arrive at decision on the subjects of its questions, or on the ability or inability of reason to form'
any judgment respecting them and therefore either to extend with confidence the bounds of our pure reason, or to set strictly defined and safe limits to its action. This last ques tion, which arises out of the above universal problem, would properly run thus How metaphysics possible as science
Thus, the critique of reason leads at last, naturally and necessarily, to science and, on the other hand, the dogma tical use of reason without criticism leads to groundless asser tions, against which others equally specious can always be set, thus ending unavoidably in scepticism.
Besides, this science cannot be of great and formidable prolixity, because has not to do with objects of reason, the variety of which inexhaustible, but merely with reason her self and her problems problems whieh arise out of her own bosom, and are not proposed to her the nature of outward 'things, but her own nature. And when once reason has previously become able completely to understand her own
power in regard to objects which she meets with in experience, will be easy to determine securely the extent and limits of
her attempted application to objects beyond the confines
? experience. mini, therefore, We may anJ
regard
the hitherto attempts
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made; to establish metaphysical science dogmatically as non existent. For what of analysis, that mere dissection of
contained in one or other, not the aim of, but only preparation for metaphysics proper, which has for its object the extension, by means of synthesis, of our a priori knowledge. And for this purpose, mere analysis of course useless, because only shews what contained in these conceptions, but not how we arrive, a priori, at them; and this her duty to shew, in order to be able afterwards to determine their valid use in regard to all objects of expe rience, to all knowledge general. But little self-denial, indeed, needed to give up these pretensions, seeing the undeniable, and in the dogmatic mode of procedure, in evitable contradictions of Reason with herself, have long since ruined the reputation of every system of metaphysics that has appeared up to this time. will require more firmness to remain undeterred by difficulty from within, and opposition from without, from endeavouring, method quite opposed to all those hitherto followed, to further the growth and fruitfulness of science indispensable to human reason -- science from which every branch has borne may be cut away, but whose roots remain indestructible.
VII. Idea and division of a pabticitlab science, ttnden THE NAME OF A CRITIQUE OF PuBE REASON.
From all that has been said, there results the idea of par ticular science, which may be called the Critique of Pvre Reason. For reason the faculty which furnishes us with the principles of knowledge priori. Hence, pure reason
the faculty which contains the principles of cognizing any thing absolutely priori. An Organon of pure reason would be a compendium of those principles according to which alone all pure cognitions priori can be obtained. The completely extended application of such an organon would afford us system of pure reason. As this, however, de manding great deal, and yet doubtful whether any extension of our knowledge be here possible, or so, in what cases we can regard science of the mere criticism of pure reason, its sources and limits, as the propcedeutie to ? yBtem of pure reason. Such science must not be called Doctrine, but only Criticie of pure Reason and iu use,
conceptions,
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? l<< INTRODUCTION
in regard to speculation, would be only negative, hot to en large the bounds of, but to purify our reason, and to shield it against error, --which alone is no little gain. I apply the term transcendental to all knowledge which is not so much occu pied with objects as with the mode of our cognition of these objects, so far as this mode of cognition is possible a priori. A system of such conceptions would be called Transcendental Philosophy. But this, again, is still beyond the bounds of our present essay. For as such a science must contain a complete exposition not only of our synthetical a priori, but of our analytical & priori knowledge, it is of too wide a range for our present purpose, because we do not require to carry our analysis any farther than is necessary to understand, in their full extent, the principles of synthesis a priori, with which alone we have to do. This investigation, which we cannot properly call a doctrine, but only a transcendental critique, because it aims not at the enlargement, but at the correction and guidance of our knowledge, and is to serve as a touchstone of the worth or worthlessness of all know ledge a priori, is the sole object of our present essay. Such a critique is consequently, as far as possible, a preparation for an organon ; and if this new organon should be found to fail, at least for a canon of pure reason, according to which the complete system of the philosophy of pure reason, whether it extend or limit the bounds of that reason, might one day be set forth both analytically and synthetically. For that this is possible, nay, that such a system is not of so great extent as to preclude the hope of its ever being com
is evident. For we have not here to do with the nature of outward objects, which is infinite, but solely with the mind, which judges of the nature of objects, and, again, with the mind only in respect of its cognition & priori. And the object of our investigations, as it is not to be sought without, but altogether within ourselves, cannot remain con cealed, and in all probability is limited enough to be com pletely surveyed and fairly estimated, according to its worth or worthlessness. Still less let the reader here expect a critique of books and systems of pure reason ; our present object is exclusively a critique of the faculty of pure reason itself. Only when we make this critique our foundation, do we possess a pure touchstone for estimating the philosophical
? pleted,
? ? ? IDEA OF A UKITMiDl
OF PUKE HEA. SOIT. 17
value of ancient and modern writings on this subject; and without this criterion, the incompetent historian or judge decides upon and corrects the groundless assertions of others with his own, which have themselves just as little foundation.
Transcendental philosophy is the idea of a science, for
which the Critique of Pure Reason must sketch the whole
plan architectonically, that from principles, with full
guarantee for the validity and stability of all the parts which
enter into the building. the system of all the principles
of pure reason. If this Critique itself does not assume the
title of transcendental philosophy, only because, to be
complete system, ought to contain full analysis of all
human knowledge a priori. Our critique must, indeed, lay
before us complete enumeration of all the radical concep
tions which constitute the said pure knowledge. But from
the complete analysis of these conceptions themselves, as
also from complete investigation of those derived from
them, abstains with reason partly because would he
deviating from the end in view to occupy itself with this
analysis, since this process not attended with the difficulty
and insecurity to be found in the synthesis, to which our
critique entirely devoted, and partly because would be
inconsistent with the unity of our plan to burden this essay
with the vindication of the completeness of such an analysis
and deduction, with which, after all, we have at present
nothing to do. This completeness of the analysis of these radical conceptions, as well as of the deduction from the
? a priori which may be given the analysis, we can, however, easily attain, provided only that we are in pos session of all these radical conceptions, which are to serve as principles of the synthesis, and that in respect of tills main purpose nothing wanting.
To the Critique of Pure Reason, therefore, belongs all that constitutes transcendental philosophy and the complete idea of transcendental philosophy, but still not the science itself oecause only proceeds so far with the analysis as necessary to the power of judging completely of our syn thetical knowledge a priori.
The principal thing we must attend to, in the division of the parts of science like this, that no conceptions must tnter which contain aught empirical other words, that
conceptions
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? 18
INTROUUCTION.
the knowledge i prion" must be completely pure. Hence, although the highest principles and fundamental conceptions of morality are certainly cognitions & priori, yet they do not belong to transcendental philosophy ; because, though they certainly do not lay the conceptions of pain, pleasure, desires, inclinations, &c. , (which are all of empirical origin) at the foundation of its precepts, yet still into the conception of duty, --as an obstacle to be overcome, or as an incitement which should not be made into a motive, --these empirical conceptions must necessarily enter, in the constiuction of a system of pure morality. Transcendental philosophy is con sequently a philosophy of the pure and merely speculative reason. For all that is practical, so far as it contains mo tives, relates to feelings, and these belong to empirical sources of cognition.
If we wish to divide this science from the universal point of view of a science in general, it ought to comprehend, first, a Doctrine of the Elements, and, secondly, a Doctrine of tht Method of pure reason. Each of these main divisions will have its subdivisions, the separate reasons for which we cannot here particularise. Only so much seems necessary, by way of introduction or premonition, that there are two sources of human knowledge (which probably spring from a common, but to us unknown root), namely, sense and under standing. By the former, objects are given to us ; by the latter, thought. So far as the faculty of sense may contain representations h priori, which form the conditions under which objects are given, in so far it belongs to transcendental
? The transcendental doctrine of sense must form the first part of our science of elements, because the con ditions under which alone the objects of human knowledge are givea, must precede those under which they are thought.
philosophy.
? ? ? ? OF PURE REASON.
TRANSCENDENTAL DOCTRINE OF ELEMENTS.
CRITIQUE
? ? ? TRANSCENDENTAL DOCTRINE OF ELEMENTS. PART FIRST.
TRANSCENDENTAL ESTHETIC.
? 1. Introductory.
In whatsoever mode, or by whatsoever means, our know ledge may relate to objects, it is at least quite clear, that the only manner in which it immediately relates to them, is by means of an intuition. To this as the indispensable ground work, all thought points. But an intuition can take place >>nly in so far as the object is given to us. This, again, is only possible, to man at least, on condition that the object affect the mind in a certain manner. The capacity for receiving re presentations (receptivity) through the mode in which we are affected by objects, is called sensibility. By means of sensi bility, therefore, objects are given to us, and it alone furnishes us with intuitions ; by the understanding they are thought, and from it arise conceptions. But all thought must directly, ' r indirectly, by means of certain signs, relate ultimately to intuitions ; consequently, with us, to sensibility, because in no other way can an object be given to us.
The effect of an object upon the faculty of representation, sc far as we are affected by the said object, is sensation. That sort of intuition which relates to an object by means of sensa tion, is called an empirical intuition. The undetermined ob
ject of an empirical intuition, is called phenomenon. Thnt which in the phenomenon corresponds to the sensation, I term its matter ; but that which effects that the content of the pheno menon can be arranged under certain relations, I call its form. But that in which our sensations are merely arranged, and by which they are susceptible of assuming a certain form, can not be itself sensation. It is then, the matter of all pbeno- mena that is given to us h posteriori ; the form must lie ready i priori for them in the mind and consequently can be re garded separately from all sensation.
? ? ? ? 22 TRANSCENDENTAL JS8THETI0.
I call all representations pure, in the transcendental n lean ing of the word, wherein nothing is met with that belongs to sensation. And accordingly we find existing in the mind << priori, the pure form of sensuous intuitions in general, in which all the manifold content of the phenomenal world ii nrranged and viewed under certain relations. This pure form of sensibility I shall call pure intuition. Thus, if I take away from our representation of a body, all that the under standing thinks as belonging to as substance, force, divisi bility, &c. , and also whatever belongs to sensation, as impe netrability, hardness, colour, &c. yet there still something left us from this empirical intuition, namely, extension and shape. These belong to pure intuition, which exists priori
in the mind, as mere form of sensibility, and without any real object of the senses or any sensation.
The science of all the principles of sensibility priori, call Transcendental JEsthetic. * There must, then, be such science, forming the first part of the transcendental doctrine of elements, in contradistinction to that part which contains the principles of pure thought, and which called transcen dental logic.
In the science of transcendental esthetic accordingly, we shall first isolate sensibility or the sensuous faculty, by sepa rating from all that annexed to its perceptions by the conceptions of understanding, so that nothing be left but em pirical intuition. In the next place we shall take away from this intuition all that belongs to sensation, so that nothing may remain but pure intuition, and the mere form of phaj-
* The Germans are the only people who at present use this word to indicate what others call the critique of taste. At the foundation of this term lies the disappointed hope, which the eminent analyst, Baum- garten, conceived, of subjecting the criticism of the beautiful to principles of reason, and so of elevating its rules into science. But his endeavours were vain. For the said rules or criteria are, in respect to their chief sources, merely empirical, consequently never can serve as determinate laws priori, by which our judgment in matters of taste to be directed.
rather our judgment which forms the proper test as to the correct ness of the principles. On this account advisable to give up the use of the term as designating the critique of taste, and to apply solely to that doctrine, which true scieLce,-- the science of the laws of sensibility -- and thus come nearer to the language and the sense of the ancients in their well-known division of the objects of cognition into m'oSi;ra icai vonra or to share with speculative philosophy, and emilloj partly in tran scendental. uartlY in psvcholnsicr. l signification.
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? JlETAPHrSIOAL EXPOSITION OF 8PACB, 2. ')
nomsna, which is all that the sensibility can afford a priori. From this investigation it will be found that there are two ore forms of sensuous intuition, as principles of knowledge
priori, namely, space and time. To the consideration of these we shall now proceed.
SECTION I. OF SPACE.
? 2. Metaphysical Exposition of this Conception.
Bx means of the external sense (a property of the mind), we represent to ourselves objects as without us, and these all in space. Therein alone are their shape, dimensions, and rela tions to each other determined or determinable. The internal sense, by means of which the mind contemplates itself or its internal state, gives, indeed, no intuition of the soul as an object ; yet there is nevertheless a determinate form, under which alone the contemplation of our internal state is pos sible, bo that all which relates to the inward determinations of the mind is represented in relations of time. Of time we cannot have any external intuition, any more than we can have an internal intuition of space. What then are time and space ? Are they real existences I Or, are they merely relations or de terminations of things, such however, as would equally belong to these things in themselves, though they should never become objects of intuition ; or, are they such as belong only to the form of intuition, and consequently to the subjective consti tution of the mind, without which these predicates of time and space could not be attached to any object ? In order to become informed on these points, we shall first give an expo sition of the conception of space. By exposition, I mean the
clear, though not detailed, representation of that which belongs to a conception ; and an exposition is metaphysical, when it contains that which represents the conception as given a priori.
1. Space is not a conception which has been derived from outward experiences. For, in order that certain sen sations may relate to something without me, (that to something which occupies different part of space from that
which am) in like manner, in order that may represent them not merely as without of and near to each other, but also in separate places, the representation of space must alreudj
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exist as a foundation. Consequently, the representation of space cannot be borrowed from the relations of external phe
nomena through experience ; but, on the contrary, this ex ternal experience is itself only possible through the said ante cedent representation.
2. Space then is a necessary representation & priori, which serves for the foundation of all external intuitions. We never can imagine or make a representation to ourselves of the non existence of space, though we may easily enough think that no objects are found in it. It must, therefore, be considered as the condition of the possibility of phenomena, and by no means as a determination dependent on them, and is a repre sentation & priori, which necessarily supplies the basis for external phenomena.
3. Space is no discursive, or as we say, general conception of the relations of things, but a pure intuition. For in the first place, we can only represent to ourselves one space, and when we talk of divers spaces, we mean only parts of one and the same space. Moreover these parts cannot antecede this one all-embracing space, as the component parts from which the aggregate can be made up, but can be cogitated only as existing in it. Space is essentially one, and multiplicity in
consequently the general notion of spaces, of this or that space, depends solely upon limitations. Hence follows that an priori intuition (which not empirical), lies at the root of nil our conceptions of space. Thus, moreover, the principles of geometry, -- for example, that " in triangle, two sides together are greater than the third," are never deduced from general conceptions of line and triangle, but from in tuition, and this priori, with apodeictic certainty.
4. Spnce represented as an infinite given quantity. Now every conception must indeed be considered . u representa tion which contained in an infinite multitude of different
possible representations, which, therefore, comprises these under itself but no conception, as such, can be so conceived, as contained within itself an infinite multitude of representations. Nevertheless, space so conceived of, for all parts of space ire equally capable of being produced to infinity. Conse quently, the original representation of space an intuition a priori, and not conception
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TBAN8CENDENTAL
EXPOSITION OF SPACE.
i 3. Transcendental exposition of the conception of Space.
By a transcendental exposition, I mean the explanation of a conception, as a principle, whence can be discerned the possi bility of other synthetical a priori cognitions. For this pur pose, it is requisite, firstly, that such cognitions do really flow from the given conception ; and, secondly, that the said cog nitions are only possible under the presupposition of a given mode of explaining this conception.
Geometry is a science which determines the properties of space synthetically, and yet & priori. What, then, must be our representation of space, in order that such a cognition of it may be possible ? It must be originally intuition, for from a mere conception, no propositions can be deduced which go out beyond the conception,* and yet this happens in geometry.
But this intuition must be found in the mind ipriori, that before any perception of objects, consequently must be pure, not empirical, intuition. For geometrical prin ciples are always apodeictic, that united with the conscious ness of their necessity, as, '* Space has only three dimen sions. " But propositions of this kind cannot be empirical judgments, nor conclusions from them. (Introd. II. ) Now, how can an external intuition anterior to objects themselves, and in which our conception of objects can be determined a priori, exist in the human mind? Obviously not otherwise than in so far as has its seat in the subject only, as the formal capacity of the subject'sbeing affected objects, and thereby of obtaining immediate representation, that intuition con sequently, only as the form, the external sense general.
Thus only means of our explanation that the pos sibility of geometry, as synthetical science priori, becomes comprehensible.
Every mode of explanation which does not shew us this possibility, although in appearance may be similar to ours, can with the utmost certainty be distinguished from by these marks.
4. Conclusion* from the foregoing conceptions.
(a) Space does not represent any property of objects as
? That is, the analysis of conception only gives you what contained and does not add to your knowledg: of the object of wliich j-1u
have concqtion, but merely evolve* it. -- TV.
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? 26 THANSCENDENTAL -F. STHETIC.
things in themselves, nor does it represent them in their rela tions to each other ; in other words, space does not represent to us any determination of objects such as attaches to the ob jects themselves, and would remain, even though all subjective conditions of the intuition were abstracted. For neither abso lute nor relative determinations of objects can be intuited prior to the existence of the things to which they belong, and therefore not b) priori.
(b) Space is nothing else than the form of all phenomena of the external sense, that the subjective condition of the sensi bility, under which alone external intuition possible. Now, oecause the receptivity or capacity of the subject to be affected
objects necessarily antecedes all intuitions of these objects, easdy understood how the form of all phenomena can be
given in the mind previous to all actual perceptions, there fore priori, and how as pure intuition, in which all objects must be determined, can contain principles of the relations of these objects prior to all experience.
therefore from the human point of view only that we
can speak of space, extended objects, &c. If we depart from the subjective condition, under which alone we can obtain external intuition, or, in other words, by means of which we are affected by objects, the representation of space has nc meaning whatsoever. This predicate [of space] only appli cable to things in so far as they appear to us, that are objects of sensibility. The constant form of this receptivity, which we call sensibility, necessary condition of all rela tions in which objects can be intuited as existing without us, and when abstraction of these objects made, pure intuition, to which we give the name of space. clear that we can not make the special conditions of sensibility into conditions of the possibility of things, but only of the possibility of their existence as far as they are phenomena. And so we may correctly say that space contains all which can appear to us externally, but not all things considered as things them selves, be they intuited or not, or by whatsoever subject one will. As co the intuitions of other thinking beings, we can not judge whether they are or are not bound by the same conditions which limit our own intuition, and which for us are universally valid. If we join the limitation of judgment to the conception of the subject, then the judgment will po<<
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? OF SPACE. -- CONCLUSIONS TOM THE FOREWOINO. 27
sess unconditioned validity. For example, the proposition, "All objects are beside each other in space," is valid only under the limitation that these things are taken as objects of our sensuous intuition. But if I join the condition to the con ception, and say, " all things, as external phenomena, are be side each other in space," then the rule is valid universally, and without any limitation. Our expositions, consequently, teach the reality e. the objective validity) of space in re gard of all which can be presented to us externally as object, and at the same time also the ideality of space in regard to objects when they are considered means cf reason as things in themselves, that without reference to the constitution of our sensibility. We maintain, therefore, the empirical reality of space in regard to all possible external experience, although we must admit its transcendental ideality in other words, that nothing, so soon as we withdraw the condition upon
which the possibility of all experience depends, and look upon space as something that belongs to things in themselves.
But, with the exception of space, there no representation, subjective and referring to something external to us, which could be called objective prion. For there are no other
subjective representations from which we can deduce syn thetical propositions priori, as we can from the intuition of space. (See 3. ) Therefore, to speak accurately, no ideality whatever belongs to these, although they agree in this respect with the representation of space, that they belong merely to the subjective nature of the mode of sensuous perception such mode, for example, as that of sight, of hearing, and of feeling, by means of the sensations of colour, sound, and heat, but which, because they are only sensations, and not intuitions, do not of themselves give us the cognition of any object, least of all, an a priori cognition. My purpose, in the above remark, merely this to guard any one against illus-
trating the asserted ideality of space by examples quite insuffi
cient, for example, by colour, taste, &c. for these must be con
templated not as properties of things, but only as changes in the subject, changes which may be different in different men. For
such case, that which originally mere phenomenon, rose, for example, taken by the empirical understanding for
thing in itself, though to every different eye, in respect of its colour, may appear different. On the contrary, -tbo
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? 28 TBiNSCEXDENTAX JESTHSTIC.
transcendental conception of pbsenomena admonition, that, genera! , nothing which thing in itself, and that space not
space critical intuited apace form which be
longs as property to things but that objects are quite unknown to us in themselves, and what we call outward ob jects, are nothing else but mere representations of our sensi bility, whose form space, but whose real correlate, the tiling in itself, not known by means of these representa tions, nor ever can be, but respecting which, in experience, no inquiry ever made.
SECTION II. OF TIME.
5. Metaphysical exposition this conception.
Time not an empirical conception. For neither co existence nor succession would be perceived us, the re
? of time did not exist <<s foundation
Without this presupposition we could not represent to our selves that things exist together at one and the same time, or at different times, that contemporaneously, or succession.
2. Time necessary representation, lying at the found ation of all our intuitions. With regard to phenomena general, we cannot think away time from them, and represent them to ourselves as out of and unconnected with time, bul we can quite well represent to ourselves time void of pheno mena. Time therefore given priori. In alone aL reality of phenomena possible. These may all be annihilated in thought, but time itself, as the universal condition of their possibility, cannot be so annulled.
3. On this necessity priori, also founded the possibility of apodeictic principles of the relations of time, or axioms of time in general, such as, " Time has only one dimension," " Different times are not co-existent but successive," (as dif ferent spaces are not successive but co-existent). ' These principles cannot be derived from experience, for would give neither strict universality, nor apodeictic certainty. We should Dnly be able to say, " so common experience teaches us," but not must be so. They are valid as rules, through which,
general, experience possible; and they instruct us respect ing experience, and not means of it.
presentation
priori.
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? TRANSCENDENTAL EXPOSITION OF TIME. 1! 9
4. Time is not a discursive, or as it is called, general con ception, but a pure form of the sensuous intuition. Different times are merely parts of one and the same time. But the representation which can only be given by a single object is an intuition. Besides, the proposition that different times can not be co-existent, could not be derived from a general con ception. For this proposition is synthetical, and therefore cannot spring out of conceptions alone. It is therefore con tained immediately in the intuition and representation of time.
5. The infinity of time signifies nothing more than that every determined quantity of time is possible only through limitations of one time lying at the foundation. Consequently, the original representation, time, must be given as unlimited. But as the determinate representation of the parts of time and of every quantity of an object can only be obtained by limitation, the complete representation of time must not be furnished by means of conceptions, for these contain only partial representations. Conceptions, on the contrary, must have immediate intuition for their basis.
? 6. Transcendental exposition of the conception of lime.
I may here refer to what is said above (? 5, 3), where, for the sake of brevity, I have placed under the head of metaphy sical exposition, that which is properly transcendental. Here I shall add that the conception of change, and with it the conception of motion, as change of place, is possible only through and in the representation of time ; that if this re presentation were not an intuition (internal) h priori, no con ception, of whatever kind, could render comprehensible the possibility of change, in other words, of a conjunction of contra dictorily opposed predicates in one and the same object, for ex ample, the presence of a thing in a place and the non-presence of the same thing in the same place. It is only in time, that it is possible to meet with two contradictorily opposed deter
minations in one thing, that after each other. * Thus our conception of time explains the possibility of so much syn-
Kant's meaning You cannot affirm and deny the tame thing of subject, except by means of the representation, time. No other idea, intuition, or conception, or whatever other form of thought there to an mediate the connection of such predicates. -- TV
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? so TRANSCENDENTAL JEBTHETTC.
thetical knowledge a priori, as is exhibited in the general doctrine of motion, which is not a little fruitful.
? 7. Conclusions from the above conceptions.
(a) Time is not something which subsists of itself, or which inheres in things as an objective determination, and therefore remains, when abstraction is made of the subjective conditions of the intuition of things. For in the former case, it would be something real, yet without presenting to any power of perception any real object. In the latter case, as an order or determination inherent in things themselves, it could not be antecedent to things, as their condition, nor discerned or intuited by means of synthetical propositions a priori. But all this is quite possible when we regard time as merely the subjective condition und<<"r which all our intuitions take place. For in that case, this form of the inward intuition can be represented prior to the objects, and consequently a priori.
(b) Time is nothing else than the form of the internal sense, that of the intuitions of self end of our internal state. For time cannot be any determination cf outward phsenomena.
has to do neither with shape nor position on the contrary, determines the relation of representations in our internal state. And precisely because this internal intuition presents
to us no shape or form, we endeavour to supply this want analogies, and represent the course of time line pro gressing to infinity, the content of which constitutes series which only of one dimension and we conclude from the properties of this line as to all the properties of time, with this single exception, that the parts of the line are co-existent, whilst those of time are successive. From this clear also that the representation of time itself an intuition, because all its relations can be expressed in an external tuition.
(<r) Time the formal condition o priori of all phenomena whatsoever. Space, as the pure form of external intuition, limited as condition a priori to external phsenomena
? alone. On the other hand, because all representations, whether they have or have not external things for their ob jects, still in themselves, ns determinations of lie niiud, belong to our internal state and because this internal state
subject to the formal condition of the internal intuition, that
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? OV TTMB. -- CONCLUSIONS FROM THE FOBESOtJfG.
31
to time, --time is a condition h priori of all phenomena what soever -- the immediate condition of all internal, and thereby the mediate condition of all external phenomena. If I can sny a priori, " all outward phenomena are in space, and de termined a priori according to the relations of space," I can also, from the principle of the internal sense, affirm univer sally, " all phenomena in general, that all objects of the senses, are in time, and stand necessarily in relations of time. "
If we abstract our internal intuition of ourselves, and all external intuitions, possible only by virtue of this internal
intuition, and presented to us our faculty of representation, and consequently take objects as they are in themselves, then time nothing. only of objective validity in regard to phenomena, because these are things which we regard as ob jects of our senses. no longer objective, we make ab straction of the sensuousness of our intuition, in other words, of that mode of representation which peculiar to us, and speak of things in general. Time therefore merely sub jective condition of our (human) intuition, (which always sensuous, that so far as we are affected by objects,) and in itself, independently of the mind or subject, nothing. Nevertheless, in respect of all phenomena, consequently of all things which come within the sphere of our experience, necessarily objective. We cannot say, "all things are in time," because in this conception of things in general, we abstract and make no mention of any sort of intuition of
But this the proper condition under which time belongs to our representation of objects. If we add the condition to the conception, and say, " all things, as phe nomena, that objects of sensuous intuition, are time," then the proposition has its sound objective validity and universality
prion.
What we have now set forth teaches, therefore, the empirical
reality of time that is, its objective validity in reference to
all objects which can ever be presented to our senses. And Ma our intuition is always sensuous, no object ever can be pre sented to us in experience, which does not come under the conditions of time. On the other hand, we deny to time all claim to absolute reality that we deny that without having regard to the form of our sensuous intuition, absolutely inheres in things as condition or property. Such properties
? things.
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? 82 TRANSCENDENTAL . ESTHETIC.
as belong to objects as things in themselves, never can be presented to us through the medium of the senses. Herein consists, therefore, the transcendental ideality of time, according to which, if we abstract the subjective conditions of sensuous intuition, it is nothing, and cannot be reckoned as subsisting or inhering in objects as things in themselves, independently of its relation to our intuition. This ideality, like that of space, is not to be proved or illustrated by fallacious analogies with sensations, for this reason, --that in such arguments or illustrations,we make the presupposition that the phenomenon, in which such and such predicates inhere, has objective reality, while in this case we can only find such an objective reality as is itself empirical, that is, regards the object as a mere phenomenon. In reference to this subject, see the remark in Section I. (p. 27).
? 8. Elueidation.
Against this theory, which grants empirical reality to time, but denies to it absolute and transcendental reality, I have hear:! from intelligent men an objection so unanimously urged, that I conclude that it must naturally present itself to every reader to whom these considerations are novel. It runs thus : " Changes are real ;" (this the continual change in our own representations demonstrates, even though the existence of ail external phsenomeua, together with their changes, is denied). Now, changes are only possible in time, and therefore time must be something real. But there is no difficulty in answer ing this. I grant the whole argument. Time, no doubt, is something real, that the real form of our internal intuition. therefore has subjective reality, in reference to our internal experience, that have really the representation of time, and of my determinations therein. Time, therefore,
not to be regarded as an object, but as the mode of repre sentation of myself as an object. But could intuite my self, or be intuited another being, without this condition of sensibility, then those very determinations which we now represent to ourselves as changes, would present to us knowledge in which the representation of time, and conse quently of change, would not appear. The empirical realit'y of time, therefore, remains, as the condition of all our expe rience. But absolute realify, accorJing tn what has bven
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? 01 SfACZ AHD TIME. --ELTCIDATOBT. REMARK8. 83
(aid above, cannot be granted it. Time is nothing but the form of our internal intuition. * If we take away from it the special condition of our sensibility, the conception of tira also vanishes ; and it inheres not in the objects themselves, but solely in the subject (or mind) which intuites them.
But the reason why this objection is so unanimously brought against our doctrine of time, and that too by disputants who cannot start any intelligible arguments against the doc trine of the ideality of space, is this, --they have no hope of demonstrating apodeictically the absolute reality of space, be cause the doctrine of idealism is against them, according to which the reality of external objects is not capable of any strict proof. On the other hand, the reality of the object of our internal sense (that is, myself and my internal state) is clear immediately through consciousness. The former --exter nal objects in space -- might be a mere delusion, but the latter -- the object of my internal perception -- is undeniably real. They do not, however, reflect that both, without question of their reality as representations, belong only to the genus phe- nomeuon, which has always two aspects, the one, the object considered as a thing in itself, without regard to the mode of intuiting and the nature of which remains for this very reason problematical, the other, the form of our intui tion of the object, which must be sought not in the object as thing itself, but the subject to which appears, -- which form of intuition nevertheless belongs really and neces
sarily to the phenomenal object.
Time and space are, therefore, two sources of knowledge,
from which, priori, various synthetical cognitions can be drawn. --Of this we find striking example in the cognitions of space and its relations, which form the foundation of pure ma thematics. --They are the two pure forms of all intuition, and thereby make synthetical propositions a priori possible. But these sources of knowledge being merely conditions of our sensibility, do therefore, and as such, strictly determine their own range and purpose, in that they do not and cannot present
can indeed >ay " my representations follow one aoother, or an successive" but this means only that we are conscious of tbrm as in succession, that is, according to the form of the internal sense. Time, therefore, not thing in itself, nor any objective determination nertaining to, or inherent things.
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? 34 TRANSCENDENTAL JESTHETIC.
objects as things in themselves, but are applicable to them solely in so far as they are considered as sensuous pheno mena. The sphere of phenomena is the only sphere of their validity, and if we venture out of this, no further objective use can be made of them. For the rest, this formal reality of time and space leaves the validity of our empirical know ledge unshaken ; for our certainty in that respect is equally firm, whether these forms necessarily inhere in the things themselves, or only in our intuitions of them. On the other hand, those who maintain the absolute reality of time and space, whether as essentially subsisting, or only inhering, as modifications, in things, must find themselves at utter variance with the principles of experience itself. For, if they decide for the first view, and make space and time into substances, this being the side taken by mathematical natural philosophers, they must admit two self-subsisting nonentities, infinite and eternal, which exist (yet without there being any thing real) for the purpose of containing in themselves every thing that is real. If they adopt the second view of inherence, which is preferred by some metaphysical natural philosophers, and regard space and time as relations (contiguity in space or suc cession in time), abstracted from experience,
? though repre sented confusedly in this state of separation, they find them selves in that case necessitated to deny the validity of mathe
matical doctrines &, priori in reference to real things (for example, in space), --at all events their apodeictic cer tainty. For such certainty cannot be found in an it posteriori proposition ; and the conceptions ct priori of space and time are, according to this opinion, mere creations of the ima gination,* having their source really in experience, inasmuch as, out of relations abstracted from experience, imagination has made up something which contains, indeed, general statements of these relations, yet of which no application can be made without the restrictions attached thereto by nature. 'The former of these parties gains this advantage, that they keep the sphere of phenomena free for mathematical science. On the other hand, these very conditions (space and time) embarrass them greatly, when the understanding endeavours
? This word is hpre uNd, and will be hereafter always used, in its prraii. live tense.
