To perceive victory when it is known to all is not really skilful. Everyone calls victory in battle good, but it is not really good.

One defends when his strength is inadequate, he attacks when it is abundant.

In all fighting, the direct method may be used for joining battle, but indirect methods will be needed in order to secure victory.

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

Ultimate excellence lies not in winning every battle, but in defeating the enemy without ever fighting.

It is the rule in war, if our forces are ten to the enemy's one, to surround him; if five to one, to attack him; if twice as numerous, to divide our army into two.

Weigh the situation, then move.