There are but two powers in the world, the sword and the mind. In the long run the sword is always beaten by the mind.

So long as it is able to deceive without injuring, that master of deception, the intellect, is free; it is released from its former slavery and celebrates its Saturnalia. It is never more luxuriant, richer, prouder, more clever and more daring.

A military leader must possess as much character as intellect. Men who have a great deal of intellect and little character are the least suited; they are like a ship whose masts are out of proportion to the ballast; it is preferable to have much character and little intellect. Those men whose intellect is mediocre and whose character is in proportion are likely to succeed in their profession. The base must equal the height.

True wisdom lies in one's confession about the limits of one's knowledge.

There are four powers: memory and intellect, desire and covetousness. The two first are mental and the others sensual. The three senses sight, hearing, and smell cannot well be prevented; touch and taste not at all.

Whoever in discussion adduces authority uses not intellect but rather memory.