No More Learning

For if we were asked why the
universal validity of our maxim as a law must be the condition
restricting our actions, and on what we ground the worth which we
assign to this manner of acting--a worth so great that there cannot
be any higher interest; and if we were asked further how it happens
that it is by this alone a man believes he feels his own personal
worth, in comparison with which that of an agreeable or disagreeable
condition is to be regarded as nothing, to these questions we could
give no           answer.