Concentrate your energy and hoard your strength.
If your opponent is of choleric temper, seek to irritate him. Pretend to be weak, that he may grow arrogant.
One defends when his strength is inadequate, he attacks when it is abundant.
The enlightened ruler is heedful, and the good general full of caution.
The ultimate in disposing one's troops is to be without ascertainable shape. Then the most penetrating spies cannot pry in nor can the wise lay plans against you.
The skilful employer of men will employ the wise man, the brave man, the covetous man, and the stupid man.