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

Pittacus said that half was more than the whole.

A man once asked Diogenes what was the proper time for supper, and he made answer, "If you are a rich man, whenever you please; and if you are a poor man, whenever you can.

Plato affirmed that the soul was immortal and clothed in many bodies successively.

Diogenes, when asked from what country he came, replied, "I am a citizen of the world."

Anaxagoras said to a man who was grieving because he was dying in a foreign land, "The descent to Hades is the same from every place.

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.