“According to Nietzche," said a sharp new voice, making them all jump, "philosophy is the biography of the philosopher.”

“And then he heard Mad-Eye Moody’s voice, echoing in some distant chamber of his empty brain: Jump onto the desk . . . jump onto the desk. . . .Harry bent his knees obediently, preparing to spring.Jump onto the desk. . . .Why, though? Another voice had awoken in the back of his brain.Stupid thing to do, really, said the voice.Jump onto the desk. . . .No, I don’t think I will, thanks, said the other voice, a little more firmly . . . no, I don’t really want to . . .Jump! NOW!The next thing Harry felt was considerable pain. He had both jumped and tried to prevent himself from jumping — the result was that he’d smashed headlong into the desk, knocking it over, and, by the feeling in his legs, fractured both his kneecaps.”

“The three of them fell silent. After a long pause, Hermione voiced the knottiest question of all in a hesitant voice. “Do you think we should go and ask Hagrid about it all?” “That’d be a cheerful visit,” said Ron, “ ‘Hello, Hagrid. Tell us, have you been setting anything mad and hairy loose in the castle lately?”

“Are — you — insane?” said Hermione in a hushed voice.'I don't think so,' said Harry, shrugging.”

“It's going to be all right, sir," Harry said over and over again, more worried by Dumbledore's silence than he had been by his weakened voice. "We're nearly there ... I can Apparate us both back ... don't worry ...""I am not worried, Harry," said Dumbledore, his voice a little stronger despite the freezing water. "I am with you.”

“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.”

“Hello' said a vague and dreamy voice from behind them. Harry looked up: Luna Lovegood had drifted over from the Ravenclaw table. Many people were staring at her and few people openly laughing and pointing; she had managed to procure a hat shaped like a life-size lion's head, which was perched precariously on her head.'I'm supporting Gryffindor' said Luna, pointing unnecessarily at her hat. "Look what it does...'She reached up and tapped the hat with her wand. It opened its mouth wide and gave an extremely realistic roar that made everyone in the vicinity jump.'It's good, isn't it?' said Luna happily. 'I wanted to have it chewing up a serpent to represent Slytherin, you know, but there wasn't time. Anyway...good luck, Ronald!”