One of the recurring philosophical questions is: 'Does a falling tree in the forest make a sound when there is no one to hear?' Which says something about the nature of philosophers , because there is always someone in a forest. It may only be a badger, wondering what that cracking noise was, or a squirrel a bit puzzled by all the scenery going upwards, but someone.

The mountains of madness have many little plateau of sanity.

An Assassin, a real Assassin had to look like one-black clothes, hood, boots, and all. If they could wear any clothes, any disguise, then what could anyone do but spend all day in a small room with a loaded crossbow pointed at the door?

Well, the traveling teachers do come through every few months," said the Baron. "Yes, sir, I know, sir, and they're useless, sir. They teach facts, not understanding. It's like teaching people about forests by showing them a saw. I want a proper school, sir, to teach reading and writing, and most of all thinking, sir, so people can find what they're good at, because someone doing what they really like is always an asset to any country, and too often people never find out until it's too late.

We who think we are about to die will laugh at anything.

Did I do anything last night that suggested I was sane?

He found that he had this sudden desperate longing for the fuming, smoky streets of Ankh-Morpork, which was always at its best in the spring, when the gummy sheen on the turbid waters of the Ankh River had a special iridescence and the eaves were full of birdsong, or at least birds coughing rhythmically