“Every intelligent being, whether it breathes or not, coughs nervously at some time in its life.”

“The demon coughed nervously. Demons do not breathe; however, every intelligent being, whether it breathes or not, coughs nervously at some time in its life. And this was one of them as far as the demon was concerned.”

“Real stupidity beats artificial intelligence every time.”

“The figure stopped to cough long and hard, making a noise like a wall being hit repeatedly with a bag of rocks. Moist saw that it had a beard of the short bristled type that suggested that its owner had been interrupted halfway through eating a hedgehog.”

“The fact is that camels are far more intelligent than dolphins. They are so much brighter that they soon realised that the most prudent thing any intelligent animal can do, if it would prefer its descendants not to spend a lot of time on a slab with electrodes clamped to their brains or sticking mines on the bottom of ships or being patronized rigid by zoologists, is to make bloody certain humans don't find out about it. So they long ago plumped for a lifestyle that, in return for a certain amount of porterage and being prodded with sticks, allowed them adequate food and grooming and the chance to spit in a human's eye and get away with it.”

“There were only three times in your life when it was proper to come through the front door, and you were carried every time.”

“The Ephebians believed that every man should have the vote (provided that he wasn't poor, foreign, nor disqualified by reason of being mad, frivolous, or a woman). Every five years someone was elected to be Tyrant, provided he could prove that he was honest, intelligent, sensible, and trustworthy. Immediately after he was elected, of course, it was obvious to everyone that he was a criminal madman and totally out of touch with the view of the ordinary philosopher in the street looking for a towel. And then five years later they elected another one just like him, and really it was amazing how intelligent people kept on making the same mistakes.”