Critique of Judgement by Immanuel Kant Chapter 58 Page 13

As in the case of the beautiful in Nature, an aesthetical Realism of this purposiveness cannot be perceived by sensations (for then the art would be only pleasant, not beautiful). But that the satisfaction produced by aesthetical Ideas must not depend on the attainment of definite purposes (as in mechanically designed art), and that consequently, in the very rationalism of the principle, the ideality of the purposes and not their reality must be fundamental, appears from the fact that beautiful Art, as such, must not be considered as a product of Understanding and Science, but of Genius, and therefore must get its rule through aesthetical Ideas, which are essentially different from rational Ideas of definite purposes.

Just as the ideality of the objects of sense as phenomena is the only way of