There are plenty of people who believe that Elvis is alive, or that aliens occasionally land here to do highly personal things to people, or that the whole idea of evolution is a conspiracy of godless scientists. Almost all of these people can vote and some of them have got guns.

The truth is that even big collections of ordinary books distort space, as can readily be proved by anyone who has been around a really old-fashioned secondhand bookshop, one that looks as though they were designed by M. Escher on a bad day and has more stairways than storeys and those rows of shelves which end in little doors that are surely too small for a full-sized human to enter. The relevant equation is: Knowledge = power = energy = matter = mass; a good bookshop is just a genteel Black Hole that knows how to read.

There's no point in killing an opponent... There's no triumph over a corpse, but a beaten opponent, who will remain beaten every day of the remainder of their sad and wretched life, is something to treasure.

People needed to believe in gods, if only because it was so hard to believe in people.

Stupid men are often capable of things the clever would not dare to contemplate.

You can't inspire people with facts. They need a cause. They need a symbol.

In the first book of my Discworld series, published more than 26 years ago, I introduced Death as a character; there was nothing particularly new about this - death has featured in art and literature since medieval times, and for centuries we have had a fascination with the Grim Reaper.