J.K. Rowling, Harry Potter and the Prisoner of Azkaban

"Shh! Listen! Someone’s coming! I think — I think it might be us!"

"Hasn't your experience with the Time-Turner taught you anything, Harry? The consequences of our actions are always so complicated, so diverse, that predicting the future is a very difficult business indeed..."

"Have you ever seen anything quite as pathetic" said Malfoy. "And he’s supposed to be our teacher!"Harry and Ron both made furious moves toward Malfoy, but Hermione got there first - SMACK!She had slapped Malfoy across the face with all the strength she could muster. Malfoy staggered. Harry, Ron, Crabbe, and Goyle stood flabbergasted as Hermione raised her hand"

"Turn to page three hundred and ninety-four."

"Hermione, if Harry’s seen a Grim, that’s — that’s bad,” he said.“My — my uncle Bilius saw one and — and he died twenty-four hours later!”“Coincidence,” said Hermione airily, pouring herself some pumpkin juice.“You don’t know what you’re talking about!” said Ron, starting to get angry. “Grims scare the living daylights out of most wizards!” “There you are, then,” said Hermione in a superior tone. “They see the Grim and die of fright. The Grim’s not an omen, it’s the cause of death! And Harry’s still with us because he’s not stupid enough to see one and think, right, well, I’d better kick the bucket then!"

"Three turns should do it."

"Aha! What villains are these, that trespass upon my private lands! Come to scorn at my fall, perchance? Draw, you knaves, you dogs!"

"Not at all up to your usual standard, Hermione. Only one out of three, I’m afraid. I have not been helping Sirius get into the castle and I certainly don’t want Harry dead. But I won’t deny that I am a werewolf."

"You think the dead we love ever truly leave us? You think that we don't recall them more clearly than ever in times of great trouble?"

"Don't let the Muggles get you down!"

"He had grown used to the idea that Dumbledore could solve anything."

"You think the dead we loved truly ever leave us? You think that we don't recall them more clearly in times of great trouble?"

"Your father is alive in you, Harry, and shows himself most plainly when you need of him. How else could you produce that particular Patronus? Prongs rode again last night."

"If you made a better rat than a human, it’s not much to boast about, Peter."

"I want to commit the murder I was imprisoned for."

"Hermione: You! You foul, loathsome, evil little cocroach!Ron: Hermione, no! He's no worth it."

"Hermione: You! You foul loathsome evil little cockroach!"

"Potter, you can skin Malfoy's shrivelfig."

"What was there to be gained by fighting the most evil wizard who has ever existed" said Black, with a terrible fury in his face. "Only innocent lives, Peter!"You don't understand!" whined Pettigrew. "He would have killed me, Sirius!"THEN YOU SHOULD HAVE DIED!" roared Black. "DIED RATHER THAN BETRAY YOUR FRIENDS, AS WE WOULD HAVE DONE FOR YOU!"

"Harry flung himself out from behind the bush and pulled out his wand."EXPECTO PATRONUM!" he yelled. And out of the end of his wand burst, not a shapeless cloud of mist, but a blinding, dazzling, silver animal. He screwed up his eyes, trying to see what it was. It looked like a horse. It was galloping silently away from him, across the black surface of the lake. He saw it lower its head and charge at the swarming dementors. . . . Now it was galloping around and around the black shapes on the ground, and the dementors were falling back, scattering, retreating into the darkness. . . . They were gone. The Patronus turned. It was cantering back toward Harry across the still surface of the water. It wasn't a horse. It wasn't a unicorn, either. It was a stag. It was shining brightly as the moon above. . . it was coming back to him."