Racism was not a problem on the Discworld, because - what with trolls and dwarfs and so on - speciesism was more interesting. Black and white lived in perfect harmony and ganged up on green.

You can't map a sense of humor. Anyway, what is a fantasy map but a space beyond which There Be Dragons? On the Discworld we know that There Be Dragons Everywhere. They might not all have scales and forked tongues, but they Be Here all right, grinning and jostling and trying to sell you souvenirs.

We have been so successful in the past century at the art of living longer and staying alive that we have forgotten how to die. Too often we learn the hard way. As soon as the baby boomers pass pensionable age, their lesson will be harsher still.

Even a really bad creator would at least have started with Earth, Air, Fire, Water and Surprise.

...the proliferation of luminous fungi or iridescent crystals in deep caves where the torchlessly improvident hero needs to see is one of the most obvious intrusions of narrative causality into the physical universe.

Most of my schooldays were the worst day of my life.

The words are easy - most of them have already been invented.