J.K. Rowling, Harry Potter and the Order of the Phoenix

"Accio Brain!"

"The mind is a complex and many-layered thing, Potter... or at least, most minds are..."

"Did you see me disarm Hermione, Harry?""Only once"said Hermione stung. "I got you loads more then you got me—""I did not only get you once, I got you at least three times—""Well if you're counting the one where you tripped over your own feet and knocked the wand out of my hand—"

"Things we lose have a way of coming back to us in the end, if not always in the way we expect."

"Mistletoe,"said Luna dreamily, pointing at a large clump of white berries placed almost over Harry's head. He jumped out from under it. "Good thinking,"said Luna seriously. "It's often infested with nargles."

"But Dumbledore says he doesn't care what they do as long as they don't take him off the Chocolate Frog cards."

"I am not forgotten, you know, no, I still receive a very great deal of fan mail.. . . Gladys Gudgeon writes weekly. . . . I just wish I knew why. . . .”He paused, looking faintly puzzled, then beamed again and returned to his signing with renewed vigor. “I suspect it is simply my good looks. . . ."

"It unscrews the other way."

"You can laugh! But people used to believe there were no such things as the Blibbering Humdinger or the Crumple-Horned Snorkack!"

"My Head of House said I lacked certain necessary qualities...like the ability to behave myself."

"Hello, Harry"said George, beaming at him. "We thought we heard your dulcet tones.""You don't want to bottle up your anger like that, Harry, let it all out,"said Fred, also beaming. "There might be a couple of people fifty miles away who didn't hear you."

"You know, Minister, I disagree with Dumbledore on many counts...but you cannot deny he's got style..."

"Wit beyond measure is a man's greatest treasure."

"Is it true that you shouted at Professor Umbridge?""Yes.""You called her a liar?""Yes.""You told her He Who Must Not Be Named is back?""Yes.""Have a biscuit, Potter."

"Well, we were always going to fail that one,"said Ron gloomily as they ascended the marble staircase. He had just made Harry feel rather better by telling him how he told the examiner in detail about the ugly man with a wart on his nose in the crystal ball, only to look up and realize he had been describing the examiner's reflection."

"His priority did not seem to be to teach them what he knew, but rather to impress upon them that nothing, not even... knowledge, was foolproof."

"Yeah, Quirrell was a great teacher. There was just that minor drawback of him having Lord Voldemort sticking out of the back of his head!"

"By all means continue destroying my possessions. I daresay I have too many."

"Give her hell from us, Peeves."

"I’ll make Goyle do lines, it’ll kill him, he hates writing,” said Ron happily. He lowered his voice to Goyle’s low grunt and, screwing up his face in a look of pained concentration, mimed writing in midair. “I... must... not... look... like... a... baboon’s... backside."