How does Neil Gaiman use imagery in Good Omens?

Imagery:

"Well, Hell was worse, of course, by definition. But Crowley remembered what heaven was like, and it had quite a few things in common with Hell. You couldn't get a decent drink in either of them, for a start. And the boredom you got in Heaven was almost as bad as the excitement you got in Hell."

"Anathema stared in horror at the things on the table. The maps. The homemade divinatory theodolite. The thermos that had contained hot Bovril. The torch. The rectangle of empty air where the Prophecies should have been. She'd lost it."