Words used carelessly, as if they did not matter in any serious way, often allowed otherwise well-guarded truths to seep through.

There are two things you should remember when dealing with parallel universes. One, they're not really parallel, and two, they're not really universes

He was a man who was charged with the work he did in life because he was not one to ask questions — not so much on account of any natural quality of discretion as because he simply could never think of any questions to ask.

Sherlock Holmes observed that once you have eliminated the impossible then whatever remains, however improbable, must be the answer. I, however, do not like to eliminate the impossible.

Time doesn't necessarily happen in chronological order.

Despite the fact that an Indonesian island chicken has probably had a much more natural life than one raised on a battery farm in England, people who wouldn't think twice about buying something oven-ready become much more upset about a chicken that they've been on a boat with, so there is probably buried in the Western psyche a deep taboo about eating anything you've been introduced to socially.

He almost danced to the fridge, found the three least hairy things in it, put them on a plate and watched them intently for two minutes. Since they made no attempt to move within that time he called them breakfast and ate them. Between them they killed a virulent space disease he'd picked up without knowing it in the Flargathon Gas Swamps a few days earlier, which otherwise would have killed off half the population of the Western Hemisphere, blinded the other half, and driven everyone else psychotic and sterile, so the Earth was lucky there.