The Transcendental Unity of Apperception— Immanuel Kant’s principle that every element in knowledge must be so combined with the other elements as to make possible the consciousness of one unchanging self throughout all experience. The aim of the transcendental deduction of all a priori conceptions is to show that the conceptions are a priori conditions of the possibility of all experience. The Transcendental Unity of Apperception the first condition of all knowledge, whether of the self as object or of other objects. If any matter of consciousness did not fall under the unity and become an element in the consciousness of the one system of objects, it would either destroy the unity of self or it would be for me “as good as nothing”. The manifold of perception cannot be brought into relation to the unity of self except through the categories.