Ever since time began the world has seemed stupid to those who aren't stupid themselves. It was to avoid that annoyance that I became stupid myself, as fast as ever I could. Sheer egoism, no doubt.

Celebrate within yourself that wonderful treasure . . . true kindness.

The whole secret of the study of nature lies in learning how to use one's eyes.

Weeds are omnipresent; errors are to be found in the heart of the most lovable.

Experience is always a trustworthy guide; it may not tell you everything, but it never lies.

No one makes a revolution by himself.

Work is not man's punishment. It is his reward and his strength and his pleasure.