“He never feared anything again.Because he knew the secret.Life was cheap.”

“Dean, you've been to Hell, I started the Apocalypse, and we're supposed to be possessed by an archangel and the devil. Now you're being skeptical?”

“You're not mutation, you are evolution.”

“The beginning of wisdom is the statement 'I don't know'. The person who cannot make that statement is one who will never learn anything.”

“No, he focused on the one thing that he knew would keep him grounded the way the demon said he'd need to be."Take your brother outside as fast as you can - don't look back. Now, Dean, go!" Sam's not dying. Not on my watch. You protect your family no matter what.I'm coming for you, Sammy. Just hold tight.And don't look back.He opened his eyes. Behind him, he could hear Kat's voice muttering an incantation in a language he didn't recognize. It wasn't Latin, certainly. Since it was demon magic, it was probably some language that was even more dead than Latin.The chanting stopped.Dean screamed.”

“And the next time Ash needs a favor, he can go bite me.”

“Life was, in fact, cheap.If life was such a glorious, magnificent, wonderful thing, then it wouldn't be so easy to take it away.If life was a great gift, then he wouldn't be able to kill a fellow human being with one hand...”