Use humility to make the enemy haughty. Tire them by flight. Cause division among them. When they are unprepared, attack and make your move when they do not expect it.

He who is prudent and lies in wait for an enemy who is not, will be victorious.

Invincibility lies in the defense; the possibility of victory in the attack.

The opportunity of defeating the enemy is provided by the enemy himself.

Of all rewards none [is] more liberal than those given to secret agents.

What is essential in war is victory, not prolonged operations.

The military has no constant form, just as water has no constant shape - adapt as you face the enemy, without letting them know beforehand what you are going to do.