“It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if you do not know your enemies nor yourself, you will be imperiled in every single battle.”

“If you reveal everything, bare every feeling, ask for understanding, you lose something crucial to your sense of yourself. You need to know things that others don't know. It's what no one knows about you that allows you to know yourself.”

“How do I know I can trust you?'

'You can't,' he said bluntly. 'You've got to take it on faith that the enemy of your enemy is your friend.”

“Know, my son, that the enemy will always be with you. He will be in the shadow of your dreams and in your living flesh, for he is the other part of yourself.”

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

“If you are your own worst enemy, don't do yourself any favors.”

“"To know the times" means to know the enemy's disposition in battle. Is is flourishing or waning? By observing the spirit of the enemy's men and getting the best position, you can work out the enemy's disposition and move your men accordingly.”

“I don't know who the good guys are anymore. But I do know what the enemy is. It's the compromise of principles. You lose the war when you lose your principles. And the first principle is to look out for your comrades.”

“Do not make an enemy of anyone until you know what there is between him and God! If he is good, God will not leave him to you and if he is bad, then your knowing of his badness will make you safe from him and so you do not need to make him your enemy.”

“You don’t always win your battles, but it’s good to know you fought”