Thief of Time - Destroy and Rebuild

'Look,' said Susan, 'I don't ... I'm not... Look, I understand this sort of thing. Really. I'm not stupid. My
grandfather has a garden where everything is black. But Lobsang built the clock! Well, part of him did. So he's saving the world and destroying it, all at once?'

'Family trait,' said Wen. 'It is what Time does at every instant.'

He gave Susan the look of a teacher confronted with a keen but stupid pupil.

'Think like this,' he said at last. 'Think of everything. It's an everyday word. But "everything" means...
everything. It's a much bigger word than "universe". And everything contains all possible things that can happen at all possible times in all possible worlds. Don't look for complete solutions in anyone of them. Sooner or later, everything causes everything else.'

'Are you saying one little world is not important, then?' said Susan.

Wen waved a hand, and two glasses of wine appeared on the stone.

'Everything is as important as everything else,' he said.

***

The Thief of Time - p328