So in war, the way is to avoid what is strong, and strike at what is weak.

Use humility to make the enemy haughty. Tire them by flight. Cause division among them. When they are unprepared, attack and make your move when they do not expect it.

Weigh the situation, then move.

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

In executing an Artful Strategy: When ten times greater, surround them; When five times greater, attack them; When two times greater, scatter them. If the opponent is ready to challenge: When fewer in number, be ready to evade them; When unequal to the match, be ready to avoid them. Even when the smaller opponents have a strong position, the larger opponent will capture them.

If your enemy is superior, evade him

There are not more than five musical notes, yet the combinations of these five give rise to more melodies than can ever be heard.