我的艺术是我内心世界的反映，而不是外界的。
Don't criticize what you can't understand.
心理学必须展示心灵如何服务于有机体的需求。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
The desire for recognition, the thymotic part of the soul, is the most political part of man.