Aziraphale: Look, I am good. You, I’m afraid, are evil. But people get a choice, y’know? They cannot be truly holy unless they also get the opportunity to be wicked. She is wicked.
Crowley: That only works if you start everyone off equal. You can’t start someone off like that and expect her to do as well as someone born in a castle.
Aziraphale: Ah, but no, no, that’s the good bit. The lower you start, the more opportunities you have. So Elbeth here has all the opportunities because she’s so poor.
Crowley: That’s lunacy.
Aziraphale: No, that’s ineffable.

Crowley: I don’t know how you lot have managed to stay in charge all this time.
Aziraphale: I’m not sure we have, have we?

Aziraphale: But what am I?
Crowley: You’re just an angel who goes along with Heaven as far as you can.

Crowley: You mean like a sudden rainstorm forces them together beneath the canopy. They look into each other’s eyes, and realize they were made for each other.
Aziraphale: Sounds a bit unlikely.
Crowley: No, get humans wet and staring into each other's eyes, Va-voom! Sorted.

Aziraphale: Are we sure that Sitis wants to give birth four more times?
Michael: Seven more times.
Aziraphale: But she’s already got three children.
Michael: Yeah, but, those ones will be dead. Keep up.
Aziraphale: We’re not bringing the old ones back?
Gabriel: Well, of course not. But we’re giving them new ones.
Aziraphale: I think they quite like the old ones. And if we kill them…
Gabriel: Aziraphale, we are the good guys, okay? We’re not killing anyone. What we’re doing is simply not stopping Hell. What they do is up to them.

Aziraphale: Avaunt, foul demon! In the name of the Almighty, I command thee, BEGONE!
Crowley: No.
Aziraphale: No?
Crowley: No, thank you? See, I have a permit.
Aziraphale: A permit? From whom?
Crowley: From God.

Good Omens Quotes

What’s the point in creating an infinite universe with trillions of star systems if you’re only gonna let it run for a few thousand years? The engine won’t even be probably warmed up by then.

Crowley

Aziraphale: You made it all yourself?
Crowley: Well, I mean more or less. I wasn’t the original concept designer but I worked very closely with Upstairs on it.
Aziraphale: Well, it’s very pretty.
Crowley: Oh, thank you.