One of the most striking signs of the decay of art is the intermixing of different genres.

The further one advances in experience, the closer one comes to the unfathomable; the more one learns to utilize experience, the more one recognizes that the unfathomable is of no practical value.

Correction does much, but encouragement does more. Encouragement after censure is as the sun after a shower.

Many hammer all over the wall and believe that with each blow they hit the nail on the head.

When one is polite in German, one lies.

A mathematician is only perfect insofar as he is a perfect man, sensitive to the beauty of truth.

Painting and tattooing the body is a return to animalism.