Hence that general is skilful in attack whose opponent does not know what to defend; and he is skilful in defense whose opponent does not know what to attack.

The line between disorder and order lies in logistics.

If you are far from the enemy, make him believe you are near.

Unless you know the mountains and the forests, the defiles and impasses, the lay of the marshes and swamps, you cannot maneuver with an armed force. Unless you use local guides, you cannot get the advantages of the land.

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

Therefore, just as water retains no constant shape, so in warfare there are no constant conditions.

First learn to become invincible, then wait for your enemy's moment of vulnerability.