He who does wrong is more unhappy than he who suffers wrong. — Democritus

"Men have fashioned an image of Chance as an excuse for their own stupidity. For Chance rarely conflicts with intelligence, and most things in life can be set in order by an intelligent sharpsightedness."

"The animal needing something knows how much it needs, the man does not."

"[I would] rather discover one cause than gain the kingdom of Persia."

"In fact we do not know anything infallibly, but only that which changes according to the condition of our body and of the [influences] that reach and impinge upon it."

"Coition is a slight attack of apoplexy. For man gushes forth from man, and is separated by being torn apart with a kind of blow."

"Education is an ornament for the prosperous, a refuge for the unfortunate."