Supernatural, Season 8

Dean:
We've been down roads like this before, man. With Yellow Eyes, Lucifer, Dick Friggin Roman ... we both know where this ends: one of us dies. Or worse.

Sam:
So you just up and decided it's going to be you.

Dean:
I'm a grunt, Sam. You're not. You've always been the brains of this operation. And you told me yourself, you see a way out. You see a light at the end of this ugly ass tunnel. I don't. But I tell you what I do know, is that I'm going to die with a gun in my hand. Because that's what I have waiting for me, that's all I have waiting for me. I want you to get out. I want you to have a life, become a Man of Letters, whatever. You with a wife, kids, and grandkids, living out until you're fat and bald and chugging Viagra. That is my perfect ending and it's the only one I'm gonna get. So I'm gonna do these trials and I'm gonna do them alone. End of story. You stay here. Call if you need me, but if you try to come after me I will shoot you in the leg.