“To know your Enemy, you must become your Enemy.”

“Know the enemy and know yourself; in a hundred battles you will never be in peril. When you are ignorant of the enemy, but know yourself, your chances of winning or losing are equal. If ignorant both of your enemy and yourself, you are certain in every battle to be in peril.”

“Know your enemy and know yourself and you can fight a hundred battles without disaster”

“If you know the enemy and know yourself, your victory will not stand in doubt; if you know Heaven and know Earth, you may make your victory complete.”

“Be where your enemy is not.”

“If ignorant both of your enemy and yourself, you are certain to be in peril.”

“If you wait by the river long enough, the bodies of your enemies will float by.”