All war is based on deception.

Carefully compare the opposing army with your own, so that you may know where strength is superabundant and where it is deficient.

Place your army in deadly peril, and it will survive; plunge it into desperate straits, and it will come off in safety.

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

There is no place where espionage is not possible.

When your opponent gives you an opening, be swift as a hare.

Defeat the enemies strategy.