There is no doubt that being human is incredibly difficult and cannot be mastered in one lifetime.

Granny Weatherwax was not a good loser. From her point of view, losing was something that happened to other people.

Only Ron's dog was watching William. He considered that it had, for a dog, a very offensive and knowing look. A couple of months ago someaone had tried to hand William the old story about there being a dog in the city that could talk. (...) The dog in front of William didn't look as if it could talk, but it DID look as if it would swear.

It was written in some holy book, apparently, so that made it okay, and probably compulsory.

It's tough at the top. It's tough at the bottom. But in between you could use them for horse-shoes.

It takes a special kind of person to fight back.

Of course, it is very important to be sober when you take an exam. Many worthwhile careers in the street-cleansing, fruit-picking and subway-guitar-playing industries have been founded on a lack of understanding of this simple fact.