The opportunity of defeating the enemy is provided by the enemy himself.
If you know neither the enemy nor yourself, you will succumb in every battle
To persuade your enemy to (retreat) before the fight is to defeat them even before the battle begins. An enemy made ally is no longer an enemy.
The quality of decision is like the well-timed swoop of a falcon which enables it to strike and destroy its victim.
Knowledge of the enemy's dispositions can only be obtained from other men.
Bestow rewards without regard to rule, issue orders without regard to previous arrangements; and you will be able to handle a whole army as though you had to do with but a single man.