Prolegomena to Any Future Metaphysics

Transcendent not realizable in experience; beyond the human experience; e.g. God, the soul Transcendental presupposed in and necessary to experience; a priori innate principles that allow the mind to formulate its perceptions & make experience intelligible conditions for the possibility of experience this presupposes the mind is structures to have cause/effect experiences our mind is structured to see cause/effect, space/time