Set the troops to their tasks without imparting your designs.
Therefore, just as water retains no constant shape, so in warfare there are no constant conditions.
Agitate him and ascertain the pattern of his movement.
One defends when his strength is inadequate, he attacks when it is abundant.
A warrior who is prepared to fight must also be prepared to die.
The skilful employer of men will employ the wise man, the brave man, the covetous man, and the stupid man.