In the midst of difficulties we are always ready to seize an advantage, we may extricate ourselves from misfortune.

If you know both yourself and your enemy, you can win a hundred battles without a single loss.

It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if you do not know your enemies nor yourself, you will be imperiled in every single battle.

If I am able to determine the enemy's dispositions while at the same time I conceal my own, then I can concentrate and he must divide.

Attack him where he is unprepared, appear where you are not expected.

If I determine the enemy's disposition of forces while I have no perceptible form, I can concentrate my forces while the enemy is fragmented. The pinnacle of military deployment approaches the formless: if it is formless, then even the deepest spy cannot discern it nor the wise make plans against it.

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