Dean Winchester: When a demon tells us to jump, we don't ask how high. We just ice their ass.
Bart: How very "Dean" of you.
Jack: Maybe I'm just another monster.
Dean Winchester: No, you're not. I thought you were. I did. But... Like Sam said, we've all done bad. We all have blood on our hands. So if you're a monster, we're all monsters.
Sam Winchester: It's good to see you smile.
Dean Winchester: Well, I said I needed a big win. We got Cas back. That's a pretty damn big win.
Dean Winchester: My whole life, I always believed that what we do was important. No matter what the cost, no matter who we lost, whether it was Dad or... or Bobby or... And I would take the hit. But I kept on fighting because I believed that we were making the world a better place. And now Mom and Cas... And I... I don't know. I don't know.
Sam Winchester: So now you don't believe anymore.
Dean Winchester: I just need a win. I just need a damn win.
Billie: Since I got this... new job, I stand witness to a much larger picture. Do you know what I see? You. And your brother. You're important.
Dean Winchester: Why?
Billie: You have work to do.
Billie: Because... this whole multi-versal quantum construct we live in, it's like a house of cards. And the last thing I need is some big, dumb Winchester knocking it all down.
Dean Winchester: Hmm. That does sound like us.
Dean Winchester: Dude, what is going on with you?
Sam Winchester: What are you talking about?
Dean Winchester: All day. You give me a-a beer for breakfast. You... you gave me Agent Page, which you always like to be. You... you didn't whine about me blaring my music the whole way here. And when we stopped for lunch, you ordered me chili fries.
Sam Winchester: You love chili fries.
Dean Winchester: Everybody loves chili fries. That's not the point. Now you wanna go hang out at a strip club? You hate strip clubs.
Sam Winchester: No, I don't.
Dean Winchester: Dude, the last lap dance you had was... was at Christmas. It was a gift paid for by me. You spent the entire song trying to convince the girl that she should go to nursing school. So what is it? It is my birthday? Did... did I win a bet that I don't know about? What?
Sam Winchester: No, nothing. Nothing. I-I mean, I'm just trying to be nice.
Sam Winchester: Dean, what's up with all the orders? You're starting to sound like Dad.
Dean Winchester: That a bad thing?
Sam Winchester: I'm just saying his... his drill sergeant act worked with you... but it didn't work with me. And that's not the way we're gonna get through to Jack.
Dean Winchester (to Sam about Jack): What about Cas? He manipulated him. He made him promises. Said "Paradise on Earth," and Cas bought it. And you know what that got him? It got him dead! Now you might be able to forget about that, but I can't!