Let your plans be dark and impenetrable as night.

What is essential in war is victory, not prolonged operations.

If fighting is sure to result in victory, then you must fight, even though the ruler forbid it; if fighting will not result in victory, then you must not fight even at the ruler's bidding.

Begin by seizing something which your opponent holds dear; then he will be amenable to your will.

If the enemy opens the door, you must race in.

If you know neither the enemy nor yourself, you will succumb in every battle

Attack the enemy's strategy.