Useyourillusion’s Reviews > Critique of Pure Reason > Status Update

One cannot avail oneself of a concept a priori with any security unless
one has brought about a transcendental deduction of it.

Thus I cognize myself not by being conscious of myself as thinking, but only if I am conscious to myself of the intuition of myself as determined in regard to the function of thought.

Since the proposition I think contains the form of every judgment of understanding whatever, and accompanies all categories as their vehicle, it is clear that the inferences from this proposition can contain a merely transcendental use of the understanding