Amber

“That was always the dream, wasn't it? 'I wish I'd known then what I know now'? But when you got older you found out that you NOW wasn't YOU then. You then was a twerp. You then was what you had to be to start out on the rocky road of becoming you now, and one of the rocky patches on that road was being a twerp.”
― Terry Pratchett, Night Watch

“No! Please! I'll tell you whatever you want to know!" the man yelled.
"Really?" said Vimes. "What's the orbital velocity of the moon?"
"What?"
"Oh, you'd like something simpler?”
― Terry Pratchett, Night Watch

“But here's some advice, boy. Don't put your trust in revolutions. They always come around again. That's why they're called revolutions.”
― Terry Pratchett, Night Watch

“What did I tell you about Mister Safety Catch?' said Vimes weakly.
When Mister Safety Catch Is Not On, Mister Crossbow Is Not Your Friend,' recited Detritus, saluting.”
― Terry Pratchett, Night Watch