Have you any idea how much tyrants fear the people they oppress?

Imperfect understanding is often more dangerous than ignorance.

Anyway, members of the Inquisitorial Squad do have the power to dock points so, Granger, I'll have five from you for being rude about our new Headmistress. Macmillan, five for contradicting me. Five because I don't like you, Potter. Weasley, your shirt's untucked, so I'll have another five for that. Oh yeah, I forgot, you're a Mudblood, Granger, so ten off for that.

But before he went loopy he was the life and soul of the party," said Fred. "He used to down an entire bottle of firewhiskey, then run onto the dance floor, hoist up his robes, and start pulling bunches of flowers out of his--" Yes, he sounds like a real charmer," said Hermione, while Harry roared with laughter. Never married, for some reason," said Ron.

The last words Albus Dumbledore spoke to the pair of us?' Harry is the best hope we have. Trust him.

The spells are made up. I have met people who assure me, very seriously, that they are trying to do them, and I can assure them, just as seriously, that they don’t work.

Well, usually when a person shakes their head," said McGonagall coldly, "they mean 'no.' So unless Miss Edgecombe is using a form of sign language as yet unknown to humans.