[Buffy presses her lips into a thin line and nods. She knows if she had to, she'd do it again. She's gotten past the idea that she's not going to sacrifice anymore. She got over it about the time she got back from Heaven. This is what they do. They sacrifice and they kill and they slay and they save the world, over and over again. And if they die, someone pulls them back so they can do it all over again.]