Aristippus said that a wise man's country was the world.

One of the sophisms of Chrysippus was, "If you have not lost a thing, you have it.

There is a written and an unwritten law. The one by which we regulate our constitutions in our cities is the written law; that which arises from customs is the unwritten law.

When Thales was asked what was difficult, he said, To know one's self. And what was easy, To advise another.

Time is the image of eternity.

The sun too penetrates into privies, but is not polluted by them.

Courage, my boy! that is the complexion of virtue.