When I have won a victory I do not repeat my tactics but respond to circumstances in an infinite variety of ways.

Don't flail against the world, use it. Flexibility is the operative principle in the art of war.

If you know both yourself and your enemy, you can win a hundred battles without a single loss.

If we do not wish to fight, we can prevent the enemy from engaging us even though the lines of our encampment be merely traced out on the ground. All we need to do is to throw something odd and unaccountable in his way.

Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat.

He will win who knows when to fight and when not to fight.

Thus, though I have heard of successful military operations that were clumsy but swift, cleverness has never been seen associated with long delays.