Polly felt questing eyes boring into her. She was embarrassed, of course. But not for the obvious reason. It was for the other one, the little lesson that life sometimes rams home with a stick: you are not the only one watching the world. Other people are people; while you watch them they watch you, and they think about you while you think about them. The world isn’t just about you.

You know, I never imagined there were he-dryads. Not even in an oak tree." One of the giants grinned at him. Druellae snorted. "Stupid! Where do you think acorns come from?

There are millions of chords. There are millions of numbers. And everyone forgets the one that is a zero. But without the zero, numbers are just arithmetic. Without the empty chord, music is just noise.

I wonder if it's like this for mountain climbers, he thought. You climb bigger and bigger mountains and you know that one day one of them is going to be just that bit too steep. But you go on doing it, because it’s so-o good when you breathe the air up there. And you know you'll die falling.

Nigel gave the lamp a cautious buff and small smoking red letters appeared in the air. "Hi," Nigel read aloud, "Do not put down the lamp because your custom is important to us. Please leave a wish after the tone and, very shortly, it will be our command. In the meantime, have a nice eternity."

Oh, my dear Vimes, history changes all the time. It is constantly being re-examined and re-evaluated, otherwise how would we be able to keep historians occupied? We can't possibly allow people with their sort of minds to walk around with time on their hands.

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