This book had two authors, and they were both the same person. — Terry Pratchett

'Well ... welcome. My house is your house', his brow suddenly furrowed and he looked worried, 'although only in a metaphorical sense, you understand, because I would not, much as I always admired your straightforward approach, and indeed your forthright stance, actually give you my house, it being the only house I have, and therefore the term is being extended in an, as it were, gratuitous fashion —'

Most armies are in fact run by their sergeants — the officers are there just to give things a bit of tone and prevent warfare from becoming a mere lower-class brawl.

The Deftmenes are mad and the Dumii are sane, thought Snibril, and that's just the same as being mad except that it's quieter. If only you could mix them together, you'd end up with normal people.