"It's not as simple as that. It's not a black-and-white issue. There are so many shades of gray."
"There's no grays, only white that's got grubby. I'm surprised you don't know that. And sin, young man, is when you treat people as things. Including yourself. That's what sin is."
"It's a lot more complicated than that-"
"No. It ain't. When people say things are more complicated than that, they means they're getting worried that they won't like the truth. People as things, that's where it starts."
"Oh, I'm sure there are worse crimes-"
"But they starts with thinking about people as things…"

Pratchett - "Carpe Jugulum"

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The kicking and punching stopped only when it became apparent that all the mob was attacking was itself. And, since the IQ of a mob is the IQ of its most stupid member divided by the number of mobsters, it was never very clear to anyone what had happened.

Pratchett - "Maskerade"