"Let him who would move the world first move himself."

"I am the wisest man alive, for I know one thing, and that is that I know nothing."

"I only wish that ordinary people had an unlimited capacity for doing harm; then they might have an unlimited power for doing good."

"False words are not only evil in themselves, but they infect the soul with evil."

"My advice to you is get married: if you find a good wife you'll be happy; if not, you'll become a philosopher."