“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.”

“That's why it's always worth having a few philosophers around the place. One minute it's all is truth beauty and is beauty truth, and does a falling tree in the forest make a sound if there's no one there to hear it, and then just when you think they're going to start dribbling one of 'em says, incidentally, putting a thirty-foot parabolic reflector on a high place to shoot the rays of the sun at an enemy's ships would be a very interesting demonstration of optical principles.”

“Witches are naturally nosy,” said Miss Tick, standing up. “Well, I must go. I hope we shall meet again. I will give you some free advice, though.”“Will it cost me anything?”“What? I just said it was free!” said Miss Tick.“Yes, but my father said that free advice often turns out to be expensive,” said Tiffany.Miss Tick sniffed. “You could say this advice is priceless,” she said, “Are you listening?”“Yes,” said Tiffany.“Good. Now...if you trust in yourself...”“Yes?”“...and believe in your dreams...”“Yes?”“...and follow your star...” Miss Tick went on.“Yes?”“...you’ll still be beaten by people who spent their time working hard and learning things and weren’t so lazy. Goodbye.”

“Anyway, why would you trust anything written down? She certainly didn't trust "Mothers of Borogravia!" and that was from the government. And if you couldn't trust the government, who could you trust?Very nearly everyone, come to think of it...”

“I think it's IMPOSSIBLE for anyone famous to come from here, because everyone around here is insane.”

“DO NOT PUT ALL YOUR TRUST IN ROOT VEGETABLES. WHAT THINGS SEEM TO BE MAY NOT BE WHAT THEY ARE.-Death”

“But all them things exist," said Nanny Ogg. "That's no call to go around believing in them. It only encourages 'em.”