If the mind is willing, the flesh could go on and on without many things.

To see victory only when it is within the ken of the common herd is not the acme of excellence.

Appear at points which the enemy must hasten to defend; march swiftly to places where you are not expected.

If we know that our own men are in a condition to attack, but are unaware that the enemy is not open to attack, we have gone only halfway towards victory. If we know that the enemy is open to attack, but are unaware that our own men are not in a condition to attack, we have gone only halfway towards victory. If we know that the enemy is open to attack, and also know that our men are in a condition to attack, but are unaware that the nature of the ground makes fighting impracticable, we have still gone only halfway towards victory.

Build your opponent a golden bridge to retreat across.

From a position of this sort, if the enemy is unprepared, you may sally forth and defeat him. But if the enemy is prepared for your coming, and you fail to defeat him, then, return being impossible, disaster will ensue.

Invincibility depends on one's self; the enemy's vulnerability on him.