Carefully study the well-being of your men, and do not overtax them. Concentrate your energy and hoard your strength. Keep your army continually on the move, and devise unfathomable plans.

Energy may be likened to the bending of a crossbow; decision, to the releasing of a trigger.

All warfare is based on deception. There is no place where espionage is not used. Offer the enemy bait to lure him.

It is more important to outhink your enemy, than to outfight him

We may distinguish six kinds of terrain, to wit: (1) Accessible ground; (2) entangling ground; (3) temporising ground; (4) narrow passes; (5) precipitous heights; (6) positions at a great distance from the enemy.

It is only one who is thoroughly acquainted with the evils of war that can thoroughly understand the profitable way of carrying it on.

So the important thing in a military operation is victory, not persistence.