Dean Winchester: You know when we were little, you couldn't have been more than five, you started asking me questions. Like, how come we didn't have a mom? Why we always have to move around? Where'd dad go? When he'd take off for days at a time. I remember I begged you to quit asking, Sammy, you don't want to know. I just wanted you to be a kid, just a little while longer. I was trying to protect you, keep you safe. Dad didn't even have to tell me, it was just always my responsibility. It was like I had one job. I had one job and I screwed it up. I blew it and for that I am sorry.
[Tears fall from his eyes and he wipes his eyes]
Dean Winchester: I guess that's what I do, I let down the people I love. I let dad down. And now, I guess I'm supposed to let you down, too. How can I? How am I supposed to live with that? What am I supposed to do, Sammy?
Dean Winchester: What am I supposed to do?
[Gets up and kicks the bed]
Dean Winchester: [shouting] What am I supposed to do?
Sam Winchester: You saved my life over and over. Man you sacrifice everything for me, don't you think I'd do the same for you? You're my big brother, there's nothing I wouldn't do for you. And I don't care, I'm going to get you out of this. I'm going to save your ass for a change.
Dean Winchester: I couldn't let him die, Bobby. I just couldn't. He's my brother.
Bobby Singer: How's your brother gonna feel when he knows you're going to hell?