What is the use of aesthetics if they can neither teach how to produce beauty nor how to appreciate it in good taste? It exists because it behooves rational human beings to provide reasons for their actions and assessments. Even if aesthetics are not the mathematics of beauty, they are the proof of the calculation.
Franz GrillparzerDistinctly different as a child, as an adolescent, in his prime and in his old age, man considers himself as one, not because he acts, but because he knows.
Franz Grillparzer