The enemy of my enemy is my friend.

Cox shrugged. "if that's what it takes to get laid, then I'm a fuckinin'poet. Other times I'm a fuckin' accountant. Or a plumber. Sometime's a man's gotta do what a man's gotta do.

And this was your friend?" Cordelia raised her eyebrows. "Seems to me the only difference between your friends and your enemies is how long the stand around chatting before they shoot you.

Enemies disguise as friends and friends as enemies.

I suppose [...] that the most convincing way to fool an enemy would be to fool a friend.

The enemy of my enemy is my friend, men said, but the enemy of my friend is my enemy.