The Vampire Diaries, Season 4

Stefan:
So that went well.

Damon:
Every other vampire turns it on, no problem. You kill. You feed. You do all the awful things that a vampire does. And then when you're done, you turn it back on. Why is she being so stubborn?

Stefan:
Because she has nothing to come back to. Her home's gone. Her family's gone. She alienated her friends. She destroyed her relationships.

Damon:
No. She wants to come back. Scaring the hell out of her should have worked. She's smart. She know we're not gonna hurt her.

Stefan:
All right. So we get somebody else, somebody who would really hurt her.

Damon:
Who? Katherine?

Stefan:
Think about it. She's the reason Jeremy's dead, right? So if anybody's gonna provoke an emotion, it's her.

Damon:
So we call her and then what? Beg her to help us out of the kindness of her own heart. You kidding me?

Stefan:
Katherine was just abandoned by Elijah. She has nothing. She has no one. We invite her into our house to come torture Elena. There's no way she's gonna turn that down.