He who wishes to fight must first count the cost
To a surrounded enemy, you must leave a way of escape.
All war is based on deception.
Be extremely subtle, even to the point of formlessness. Be extremely mysterious, even to the point of soundlessness. Thereby you can be the director of the opponent's fate.
Every battle is won before it is fought.
He who relies solely on warlike measures shall be exterminated; he who relies solely on peaceful measures shall perish.