No More Learning

But in the first place the former is not so absolutely necessary as the latter, because in moral concerns human reason can easily be brought to a high degree of           and completeness, even in the common- est understanding, while on the contrary in its theoretic but pure use it is wholly dialectical; and in the second place if the critique of a pure practical reason is to be complete, it must be possible at the same time to show its identity with the speculative reason in a com- mon principle, for it can ultimately be only one and the same rea- son which has to be distinguished merely in its application.