Dean Winchester: Why do you want us out of the big fight?

John Winchester: This demon... it's a bad son of a b*tch. I can't make the same moves if I worry about keeping you alive.

Dean Winchester: You mean you can't be as reckless.

John Winchester: Look... I don't expect to make it out of this in one piece. Your mother's death... it almost killed me. I can't watch my children die too. I won't.

Dean Winchester: What happens if you die? What happens if you die and we could've done something about it? You know, I've been thinking. I.... Maybe Sammy's right about this one. We should do this together. We're stronger as a family. We just are. You know it.