Each man is capable of doing one thing well. If he attempts several, he will fail to achieve distinction in any.

He who is learning and learning and doesn't apply what he knows is like the one who is plowing and plowing and doesn't seed.

Now nothing can be more important than that the work of a soldier should be well done.

That which is apprehended by intelligence and reason is always in the same state; but that which is conceived by opinion with the help of sensation and without reason, is always in a process of becoming and perishing and never really is.

At the Egyptian city of Naucratis there was a famous old god whose name was Theuth; the bird which is called the Ibis was sacred to him, and he was the inventor of many arts, such as arithmetic and calculation and geometry and astronomy and draughts and dice, but his great discovery was the use of letters.

The life which is not examined is not worth living.

Our greatest blessings come to us by way of madness, provided the madness is given us by divine gift.