I intend to leave after my death a large fund for the promotion of the peace idea, but I am skeptical as to its results.

If I have a thousand ideas and only one turns out to be good, I am satisfied.

The truthful man is usually a liar.

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.

A recluse without books and ink is already in life a dead man.

Lying is the greatest of all sins.