Success in warfare is gained by carefully accommodating ourselves to the enemy's purpose.

If the enemy has occupied them before you, do not follow him, but retreat and try to entice him away.

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

Weigh the situation, then move.

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

Wait by the river long enough and the body of your enemy will float by you.

Attack the enemy's strategy.