The Vampire Diaries Season 3 Episode 11

Damon: You want to take Klaus, you want to beat the villain, you gotta be smarter.
Stefan: No, no. To beat the villain, Damon, you have to be the better villain.

Alaric: I thought Stefan saved your life.
Damon: He did.
Alaric: And now he's willing to risk it just to see how far he can push Klaus?
Damon: Seems so.
Alaric: Well, is his humanity on or off?
Damon: Yeah, I'm thinking there's another option here in play, a bit of a dimmer switch, which is a huge problem.
Alaric: Why?
Damon: Because I can't predict how far he's willing to go until somebody gets killed.
Alaric: Suddenly you care who lives or dies?
Damon: I have a small list.

Klaus: You see, if you continue to threaten me, I'm going to be forced to retaliate. Kill people. And it'll get messy again.
Stefan: Do whatever you want. I don't really care. Or you know what? Maybe I do. Yeah. Yeah, maybe I care so much that I drop Elijah in the Arctic.
Klaus: Well, maybe I'd be willing to lose one brother if it meant killing yours.
Stefan: Try me. Let's find out.

Stefan: Destroying Klaus is all I have left.
Elena: You had me!
Stefan: I lost you the minute I left town with him.

Elena: You can't kiss me again.
Damon: I know.
Elena: I can't. It's not right.
Damon: It's right. Just not right now.