Monica (about her plan to erase Emily's message): What if Ross hears that and calls her back and they get back together? Is that what you want? ...Ross back with that controlling, neurotic, crazy... Emily? The Emily that wouldn't let him see you?
Rachel (gasps): Noooo. Oh, no, no. God, no! He should not get back together with her. I mean, I know that, you know that--even Ross knows that... but that still doesn't give us the right to erase his message.
Monica: Look, I'm his sister, okay? ...and I love him--I don't wanna see him get hurt! C'mon, doesn't that give me the right to control hi... (checks herself) ...help him?
Rachel: I don't think he's the one who needs help.
Monica: Okay, look, she's obviously unstable. Hey, I mean, she's thinking about running out on her wedding day. (seeing Rachel give her a look) Okay, fine. But look at the position she's putting him in. And what's he gonna do? ...like, Ross is gonna run over there on the wedding day and break up the marriage? Who would do that?! (seeing Rachel give her another look) Okay, fine... alright, but... y'know... that's different... (reflecting) ...although it did involve a lot of the same people.