Plot exposition that can be gently wound out by the authorial voice and internal monologue of a character in the length of a page has to be delivered in a matter of seconds on the stage.

Stories of imagination tend to upset those without one.

Belief is one of the most powerful organic forces in the multiverse. It may not be able to move mountains, exactly. But it can create someone who can. People get exactly the wrong idea about belief. They think it works back to front. They think the sequence is, first object, then belief. In fact, it works the other way.

The pen is mightier than the sword ... if the sword is very short, and the pen is very sharp.

A weapon you held and didn't know how to use belonged to your enemy.

Theres no stink more sorrorful than the stink of wet, burnt paper. It means: the end.

Got to be worth a try, I suppose," said Crowley. "It's not as if I haven't got lots of other work to do, God knows." His forehead creased for a moment, and then he slapped the steering wheel triumphantly. "Ducks!" he shouted. "What?" "That's what water slides off!" Aziraphale took a deep breath. "Just drive the car, please," he said wearily.