Spike: "Uh... Will? Now, uh, don't turn me into a horned toad for asking, but... what if we come across Ben?"
Willow: "I-I don't think a doctor's what Buffy needs right now."
Spike: "Well, yeah, especially not one who also happens to be Glory."
Giles: "What do you mean?"
Spike: "You know. Ben is Glory."
Willow: "You mean... Ben's with Glory?"
Xander: "'With' in what sense?"
Anya: "They're working together?"
Spike: "No. No. Ben is Glory. Glory's Ben. They're one and the same."
Anya: "When did all this happen?"
Spike: "Not one hour ago! Right here, before your very eyes! Ben came, he turned into Glory, snatched the kid, and pfft! Vanished, remember? You do remember...? Is everyone here very stoned? Ben! Glory! He's a doctor, she's the beast. Two entirely separate entities sharing one body. Like a bloody sitcom. Surely you remember."
Xander: "So you're saying... Ben and Glory..."
Anya: "Have a connection."
Giles: "Yes, obviously, but what kind?"
Spike: "Oh, I get it. That's very crafty. Glory's worked the kind of mojo where anyone who sees her little presto-change-o instantly forgets. And yours truly, being somewhat other than human... stands immune."
Willow: "So... Ben and Glory... are-are the same person?"
Xander: "Glory can turn into Ben, and Ben turns back into Glory."
Anya: "And anyone who sees it instantly forgets."
Spike: "Kewpie doll for the lady."
Giles: "Excellent. Now. Do we suspect there may be some kind of connection between Ben and Glory?"
Willow: "No. Buffy! Leave Dawn alone, what is this?"
Buffy #2: "My gift. This is what I do."
Willow: "I'm not talking about this, I'm talking about... this. Right here, it happened. I know it's something small, but... it's something. What?"
Buffy #2: "Don't go there, Will."
Willow: "I'm not! You're the one who keeps dragging me back here! A-and you wouldn't be doing that if you weren't trying to show me something."
Buffy #2: "Do I?"
Willow: "Buffy, come on. I-it's your brain. Just tell me. What happened here?"
Buffy #1: "This was when I quit, Will."
Willow: "You did?"
Buffy #2: "Just for a second. I remember."
Buffy #1: "I was in the magic shop."
Buffy #2: "I put a book back for Giles."
Buffy #1: "Nothing special about it. And then it hit me."
Willow: "What hit you?"
Buffy #2: "I can't beat Glory."
Buffy #1: "Glory's going to win."
Willow: "You can't know that."
Buffy #2: "I didn't just know it."
Buffy #1: "I felt it. Glory will beat me."
Buffy #2: "And in that second of knowing it, Will..."
Buffy #1: "I wanted it to happen."
Buffy #1: "I wanted it over. This is... all of this... it's too much for me."
Buffy #2: "I just wanted it over."
Buffy #1: "If Glory wins... then Dawn dies."
Buffy #2: "And I would grieve. People would feel sorry for me. But it would be over. And I imagined what a relief it would be... I killed Dawn."
Willow: "Is that what you think?"
Buffy #2: "My thinking it made it happen."
Buffy #1: "Some part of me wanted it. And in the moment Glory took Dawn..."
Buffy #2: "I know I could have done something better. But I didn't. I was off by some fraction of a second."
Buffy #1: "And this is why..."
Buffy #2: "...I killed my sister."
Willow: "I think Spike was right back at the gas station. Snap out of it!"
Buffy #1: "What?"
Buffy #2: "What?"
Willow: "All this... it has a name. It's called guilt. It's a feeling, and it's important. But it's not more than that, Buffy. Buffys. You've carried the weight of the world on your shoulders since high school. And I, I know you didn't ask for this, but... you do it every day. And so, you wanted out for one second. So what?"
Buffy #2: "I got Dawn killed."
Willow: "Hello! Your sister, not dead yet! But she will be if you stay locked inside here and never come back to us."
Buffy #2: "But what if I can't?"
Willow: "Then I guess you're right. And you did kill your sister."
--quotes taken from much ado about btvs