Critique of Judgement by Immanuel Kant Chapter 49 Page 11

Understanding and is subject to the limitation of being conformable to the concept of the latter. On the other hand, in an aesthetical point of view it is free to furnish unsought, over and above that agreement with a concept, abundance of undeveloped material for the Understanding; to which the Understanding paid no regard in its concept, but which it applies, though not objectively for cognition, yet subjectively to quicken the cognitive powers and therefore also indirectly to cognitions. Thus genius properly consists in the happy relation [between these faculties], which no science can teach and no industry can learn, by which Ideas are found for a given concept; and on the other hand, we thus find for these Ideas the expression, by means of which the subjective state of mind brought about by them, as an accompaniment of the concept, can be communicated to others.