Granny Weatherwax was often angry. She considered it one of her strong points. Genuine anger was one of the world's greatest creative forces. But you had to learn how to control it. That didn't mean you let it trickle away. it meant you dammed it, carefully, let it develop a working head, let it drown whole valleys of the mind and then, just when the whole structure was about to collapse, opened a tiny pipeline at the base and let the iron-hard stream of wrath power the turbines of revenge.

Things have no power that humans don't put there.

The trouble was that he was talking in philosophy but they were listening in gibberish.

If you have let pride get the better of you, then you have already lost, but if you grab pride by the scruff of the neck and ride it like a stallion, then you may have already won.

I reckon that Stonehege was build by the contemporary equivalent of Microsoft, whereas Avebury was definitely an Apple circle.

When people say things are a lot more complicated than that, they means they're getting worried that they won't like the truth.

That's the Ankh-Morpork instinct, Vimes thought. Run away, and then stop and see if anything interesting is going to happen to other people.