The enemy's spies who have come to spy on us must be sought out, tempted with bribes, led away and comfortably housed. Thus they will become double agents and available for our service. It is through the information brought by the double agent that we are able to acquire and employ local and inward spies. It is owing to his information, again, that we can cause the doomed spy to carry false tidings to the enemy.

What is of supreme importance in war is to attack the enemy's strategy.

The General who in advancing does not seek personal fame, and in withdrawing is not concerned with avoiding punishment, but whose only purpose is to protect the people and promote the best interests of his sovereign, is the precious jewel of the state.

To ... not prepare is the greatest of crimes; to be prepared beforehand for any contingency is the greatest of virtues.

The skillful leader subdues the enemy's troops without any fighting.

Rapidity is the essence of war.

Making no mistakes is what establishes the certainty of victory, for it means conquering an enemy that is already defeated.