Cordelia: You want I should distract him? Make with the nice-nice while you slip by?
Angel: Don't be stupid. I'm that guy and the most beautiful woman I've ever seen is making eyes at me? It's either a bachelor party or a scam.
Cordelia: What did you just call me?
Angel: I'm sorry. You're not stupid.
Cordelia: No, after that.
Angel: I saw their production of "Giselle" in 1890. I wept like a baby, and I was evil!
Heartthrob - S3-E1
Wesley: It's sad. The only way some people can find a purpose in life is by becoming obsessed with demons. By the way, Gunn, technically that wasn't a Lurite, it was a Murite, a subspecies of the Lurite. The male sports a small telltale fin just behind the third shoulder.
Gunn: I'm so glad to know we're not the sad people obsessed with demons.
Answer: Everybody including Angel saw her. After helping them and then being left alone to talk to Angel, Cordelia says that the Powers That Be let her come back one more time to help them. After Angel gets a call saying that she died, he realises that it was her spirit that was helping them the entire time.