"He once saw a boy drinking water out of his hands, and immediately threw away the cup which he carried attached to his wallet, saying, 'A boy has beaten me in plainness of living.'"

"He used to say that the only way to be happy was to be free, and the only way to be free was to be a Cynic."

"I am not an Athenian or a Greek, but a citizen of the world."

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

"The only way to overcome fear is to do what you fear."