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

"The point is, if we find out you’ve been horrible to Harry —”“— and make no mistake, we’ll hear about it.“even if you won’t let Harry use the fellytone"

"Wit beyond measure is man’s greatest treasure."

"Excellent,” said Lupin, looking up as Tonks and Harry entered. “We’ve got about a minute, I think. We should probably get out into the garden so we’re ready. Harry, I’ve left a letter telling your aunt and uncle not to worry —” “They won’t,” said Harry. “That you’re safe —” “That’ll just depress them.” “— and you’ll see them next summer.” “Do I have to?"

"The castle grounds were gleaming in the sunlight as though freshly painted; the cloudless sky smiled at itself in the smoothly sparkling lake, the satin-green lawns rippled occasionally in a gentle breeze: June had arrived."

"For our Hogwarts is in danger from external, deadly foes And we must unite inside her or we'll crumble from within"

"the world isn't split into good people and Death Eaters"

"Because if its just you alone, you're not much of a threat."

"There is a room in the Department of Mysteries, that is kept locked at all times. It contains a force that is at once more wonderful and more terrible than death, than human intelligence, than forces of nature. It is also, perhaps, the most mysterious of the many subjects for study that reside there. It is the power held within that room that you possess in such quantities and which Voldemort has not at all. That power took you to save Sirius tonight. That power also saved you from possession by Voldemort, because he could not bear to reside in a body so full of the force he detests. In the end, it mattered not that you could not close your mind. It was your heart that saved you."

"Hermione drew herself to her full height; her eyes were narrowed and her hair seemed to crackle with electricity."No," she said, her voice quivering with anger, "but I will write to your mother."

"Harry witnessed Professor Mc Gonagall walking right past Peeves who was determinedly loosening a crystal chandelier and could have sworn he heard her tell the poltergeist out of the corner of her mouth, 'It unscrews the other way."

"Rita looked as though she would have liked nothing better than to seize the paper umbrella sticking out of Hermione's drink and thrust it up her nose."

"And it’s Johnson, Johnson with the Quaffle, what a player that girl is, I’ve been saying it for years but she still won’t go out with me —''JORDAN!' yelled Professor Mc Gonagall.'Just a fun fact, Professor, adds a bit of interest —"

"Give her hell from us, Peeves."And Peeves, whom Harry had never seen take an order from a student before, swept his belled hat from his head and sprang to a salute as Fred and George wheeled about to tumultuous applause from the students below and sped out of the open front doors into the glorious sunset."

"Like the fact that the person Sirius cared for the most about in the world was you," said Dumbledore quietly."

"All those poor elves I haven’t set free yet, having to stay over during Christmas because there aren’t enough hats!"

"With another shock of excitement, Harry saw Sirius give James the thumbs-up. Sirius was lounging in his chair at his ease, tilting it back on two legs. He was very good-looking, his dark hair fell into his eyes with a sort of casual elegance neither James's nor Harry's could ever have achieved, and a girl sitting behind him was eyeing him hopefully, though he didn't seem to have noticed."

"Like all young people, you are quite sure that you alone feel and think, you alone recognize danger, you alone are the only one clever enough to realise..."

"There are plenty of eyewitness accounts, just because you're so narrow-minded you need to have everything shoved under your nose before you-"

"Directly above them, framed in the doorway from the Brain Room, stood Albus Dumbledore, his wand aloft, his face white and furious. Harry felt a kind of electric charge surge through every particle of his body - they were saved."

"You can't give a Dementor the old one-two!"