Supernatural, Season 2

Sam:
I don't know, Dean, I just, uh... I wanted to believe so badly. It's so damned hard to do this, what we do. All alone, you know. And…there's so much evil out in the world, Dean, I feel like I could drown in it. And when I think about my destiny, when I think about how I could end up…

Dean:
Yeah, well, don't worry about that, all right? I'm watching out for you.

Sam:
Yeah, I know you are. But you're just one person, Dean. And I needed to think that there was something else watching too, you know? Some higher power, some greater good. And that maybe I…

Dean:
Maybe what?

Sam:
Maybe I could be saved.