He who knows his enemy and himself well will not be defeated easily.

Invincibility depends on one's self; the enemy's vulnerability on him.

For them to perceive the advantage of defeating the enemy, they must also have their rewards.

As water has no constant form, there are in war no constant conditions.

In the practical art of war, the best thing of all is to take the enemy's country whole and intact; to shatter and destroy it is not so good.

Of all those in the army close to the commander, none is more intimate than the secret agent.

O divine art of subtlety and secrecy! Through you we learn to be invisible, through you inaudible and hence we can hold the enemy's fate in our hands.