Giles says:

"Oh, look at my mask, isn't it pretty. It raises the dead. Bloody Americans.":

"Cordelia, have you actually heard of tact?"

"In order . . . to be worthy . . . you must perform the ritual . . . in a tutu."

"I appreciate your thought on the matter. In fact, I encourage you to always challenge me when you feel its appropriate. You should never be cowed by authority. Except, of course, in this instance when I am clearly right and you are clearly wrong."

"We have to find Buffy, something terrible has happened"~pause~"Just kidding, I thought I'd give you a scare."

Giles & Friends say:

Wesley:"Well, I for one protest. You pitted Slayer against Slayer in a dangerous charade that could have gotten them both killed... without informing me! I'm telling the council!"
Giles:"I think you should. We have a rogue Slayer on our hands, I can't think of anything more dangerous."

Willow:"And you say this demon wanted cash? That's very unusual."
Giles:"Demons after money. What ever happened to the still beating heart of a virgin? No one has any standards anymore."