The light and heat of the universe comes from the sun, and its cold and darkness from the withdrawal of the sun.

Demetrius was wont to say that there was no difference between the words and speech of the unskilled and ignorant and the sounds and rumblings caused by the stomach being full of superfluous wind. This he said, not without reason, for, as he held, it did not in the least matter from what part of them the voice emanated, whether from the lower parts or the mouth, since the one and the other were of equal worth and importance.

The greater the man's soul, the deeper he loves.

Depth and strength of a human character are defined by its moral reserves.

It's not enough that you believe what you see. You must also understand what you see.

Constancy does not begin, but is that which perseveres.

He who wishes to be rich in a day will be hanged in a year.