Socrates

"Envy is the ulcer of the soul."

"The unexamined life is not worth living."

"One should never do wrong in return, nor mistreat any man, no matter how one has been mistreated by him."

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

"It is not living that matters, but living rightly."

"If all misfortunes were laid in one common heap whence everyone must take an equal portion, most people would be contented to take their...

"If a man is proud of his wealth, he should not be praised until it is known how he employs it."

"I was really too honest a man to be a politician and live."

"If you cannot persuade your country you must do whatever it orders, and patiently submit to any punishment that it imposes."

"One must not even do wrong when one is wronged, which most people regard as the natural course."