Socrates

I do not live to eat, but eat to live.

Non ut edam vivo, sed ut vivam edo.

I am not an Athenian nor a Greek, but a citizen of the world.

The only good is knowledge and the only evil is ignorance.

True knowledge exists in knowing that you know nothing.

From the deepest desires often come the deadliest hate.

By all means, marry. If you get a good wife, you'll become happy; if you get a bad one, you'll become a philosopher.

Envy is the ulcer of the soul.