“Your enemies can kill you, but only your friends can hurt you.”

“Only a true best friend can protect you from your immortal enemies.”

“It takes your enemy and your friend, working together, to hurt you to the heart: the one to slander you and the other to get the news to you.”

“Enemies can't break your spirit, only friends can.”

“Your enemy is never a villain in his own eyes. Keep this in mind; it may offer a way to make him your friend. If not, you can kill him without hate — and quickly.”

“…So really, it's just y—" [enemy player kills him] "—oh, dammit!—you, your gun, and your friends.”

“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.”

“Keep your enemies close, but your friends closer. That way your friends are between you and your enemies.”

“If you want enemies, excel your friends; but if you want friends, let your friends excel you.”

“To my mind, the only possible pet is a cow. Cows love you. They will listen to your problems and never ask a thing in return. They will be your friends forever. And when you get tired of them, you can kill and eat them. Perfect.”