War is a matter of vital importance to the state.
If their forces are substantial, prepare for them; if their forces are strong, avoid them.
If the enemy leaves a door open, you must rush in.
Do not swallow bait offered by the enemy. Do not interfere with an army that is returning home.
The good fighter is able to secure himself against defeat, but cannot make certain of defeating the enemy.
To conquer the enemy without resorting to war is the most desirable. The highest form of generalship is to conquer the enemy by strategy.