I have not the slightest pretension to call my verses poetry; I write now and then for no other purpose than to relieve depression or to improve my English.

One can state, without exaggeration, that the observation of and the search for similarities and differences are the basis of all human knowledge.

The savants will write excellent volumes. There will be laureates. But wars will continue just the same until the forces of the circumstances render them impossible.

Lying is the greatest of all sins.

Worry is the stomach's worst poison.

Good wishes alone will not ensure peace.

Kant's style is so heavy that after his pure reason, the reader longs for unreasonableness.