If you know yourself but not the enemy, for every victory gained you will also suffer a defeat.

Move not unless you see an advantage; use not your troops unless there is something to be gained; fight not unless the position is critical.

When you are ignorant of the enemy but know yourself, your chances of winning or losing are equal.

Quickness is the essence of the war.

All warfare is based on deception. There is no place where espionage is not used. Offer the enemy bait to lure him.

Humble words and increased preparations are signs that the enemy is about to advance. Violent language and driving forward as if to the attack are signs that he will retreat.

By altering his arrangements and changing his plans, the skillful general keeps the enemy without definite knowledge. By shifting his camp and taking circuitous routes, he prevents the enemy from anticipating his purpose. At the critical moment, the leader of an army acts like one who has climbed up a height and then kicks away the ladder behind him.