Oh. I see. People don't want to see what can't possibly exist.

Evil begins when you begin to treat people as things.

You don’t want people to be kind to animals because they’re animals, you just want people to be kind to animals because one of them might be you.

Contrary to popular belief and hope, people don't usually come running when they hear a scream. That's not how humans work. Humans look at other humans and say, 'Did you hear a scream?' because the first scream might have been you screaming inside your head, or a horse backfiring.

I've never known what to do," said Rincewind with hollow cheerfulness. "Been completely at a loss my whole life." He hesitated. "I think it's called being human, or something.

What was it that Granny Weatherwax had said once? "Evil starts when you begin to treat people as things". And right now it would happen if you thought there was a thing called a father, and a thing called a mother, and a thing called a daughter, and a thing called a cottage, and told yourself that if you put them all together you had a thing called a happy family.

Inside every sane person there's a madman struggling to get out," said the shopkeeper. "That's what I've always thought. No one goes mad quicker than a totally sane person.

There is never a bad time for a pun. There’s also never really a good time for a pun. You might as well just stay braced for a pun at all times, and ride them when they come with as much grace as you can manage.The fact that you can replace ‘pun’ with ‘disaster’ in the last three rules says a lot about the human race.

The anthropologists got it wrong when they named our species Homo sapiens ('wise man'). In any case it's an arrogant and bigheaded thing to say, wisdom being one of our least evident features. In reality, we are Pan narrans, the storytelling chimpanzee.