Disregarding that approach, we will illustrate the fundamental notion that the problem of how (how transcendent knowledge is possible, or, more generally, how knowledge as such is possible) can never be solved on the basis of pregiven knowledge concerning what is transcendent, or from pregiven principles of such knowledge, taken from anywhere, even from the exact sciences, by adding the following consideration: a person born deaf knows that there are tones, that harmonies are based on tones, and that a splendid art is derived from them.