The greatest victory is that which requires no battle.
Unless you enter the tiger's lair, you cannot get hold of the tiger's cub's.
It is ten thousand times cheaper to pay the best spies lavishly than even a tiny army poorly.
Generally in war the best policy is to take a state intact; to ruin it is inferior to this.
To fight and conquer in all our battles is not supreme excellence; supreme excellence consists in breaking the enemy's resistance without fighting.
Keep your friends close and your enemies even closer.