He who has health has hope, and he who has hope has everything.

If you cannot be silent be brilliant and thoughtful.

Difficulty is what wakes up the genius.

Comfort is no test of truth. Truth is often far from being comfortable.

Don't raise your voice, improve your argument.

Do not hate anybody, because that hatred which comes out from you must, in the long run, come back to you.

Appearances have very little to do with happiness.