Dean: The Darkness.
Sam: What the hell is that?
Dean: What does it sound like? Does it sound like a good thing?

This is madness, Dean!

Sam

Truth is when I left, I thought the only way out was my death. I was wrong, Sam. It's yours.

Dean

A long, long time ago, there once lived an evil bitch.

Crowley

We’re far from perfect. But we are good.

Sam

Brother, I’m done.

Dean

You’re not in my contacts list.

Castiel