If I’m in charge, I can make a difference.

Aziraphale

When Heaven ends life here on Earth, it’ll be just as dead as if Hell ended it.

Crowley

Uriel: If you leave, you can never come back.
Gabriel: That would be the point.

I didn’t collaborate with Heaven any more than Gabriel collaborated with Hell. I just found something that mattered more to me than choosing sides.

Beelzebub

Dagon: We are at war! Finally!
Crowley: Nobody’s at war. You idiots send an idiot to lead a gang of idiots to attack a bookshop. Those idiots there want their archangel back so they can fire him.

Maggie: Can we throw books at them?
Aziraphale: I’d rather you didn’t.
Nina: Obviously, no fiction, but encyclopedias? It’s all online these days anyway.
Aziraphale: Oh, if you must.

For one prince of Heaven to be cast into the outer darkness makes a good story. For it to happen twice, makes it look like there is some kind of institutional problem.

Metatron

Nina: Why do they keep blowing up?
Aziraphale: Well, it’s all a bit complicated. The circle, it’s a gateway. But if you step into it and you aren’t prepared, it can discorporate you completely.
Nina: Does what you say make sense in your head?

Muriel: How did you do that?
Crowley: I haven’t always been a demon, and they never change their passwords.

Muriel: I’m going to get into so much trouble.
Crowley: You think so? Well, then, let’s make it worthwhile.

Maggie: You lot are ridiculous.
Shax: We are the legions of the damned. We are invincible.
Maggie: You might be invincible, but you’re still stuck out there, and we’re in here. You don’t frighten me.

Muriel: Do you know how much trouble I’ll get into for this?
Crowley: It’s fine. You’re forgetting about the bees.
Muriel: Bees?
Crowley: Angels are like bees. Fiercely protective of their hive if you’re trying to get inside. Once you’re in, well, then. Is it even faintly possible that an unauthorized demon might be just wandering around in Heaven unescorted?
Muriel: [shakes her head]
Crowley: Mm, bees.
Muriel: But you don’t look like a bee! You look like a murder hornet or a snake.

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.