Thus one can and must regard as undone all attempts made until now to bring about a metaphysics dogmatically; for what is analytic in one or the other of them, namely the mere analysis of the concepts that in habit our reason a priori, is not the end at all, but only a preparation for metaphysics proper, namely extending its a priori cognition syntheti cally, and it is useless for this end, because it merely shows what is contained in these concepts, but not how we attain such concepts a priori in order thereafter to be able to determine their valid use in regard to the objects of all cognition in general.