J.K. Rowling, Harry Potter and the Half-Blood Prince

"Snape raised his wand and pointed it directly at Dumbledore."Avada Kedavra!"

"Do you remember me telling you we are practicing non-verbal spells, Potter?""Yes,"said Harry stiffly."Yes, sir.""There's no need to call me "sir"Professor."The words had escaped him before he knew what he was saying."

"The thing about growing up with Fred and George,"said Ginny thoughtfully, "is that you sort of start thinking anything's possible if you've got enough nerve."

"Nobody's ever asked me to a party before, as a friend. Is that why you dyed your eyebrow, for the party? Should I do mine too?"

"I see a light in the kitchen. Let us not deprive Molly any longer of the chance to deplore how thin you are."

"When you have seen as much of life as I have, you will not underestimate the power of obsessive love."

"When we come face-to-face with one down a dark alley, we're going to be having a shufti to see if it's solid, aren't we, we're not going to be asking, 'Excuse me, are you the imprint of a departed soul?"

"I am not worried, Harry,"said Dumbledore, his voice a little stronger despite the freezing water. "I am with you."

"It is the unknown we fear when we look upon death and darkness, nothing more."

"Dumbledore will only leave from Hogwarts when there are none loyal to him!"

"It is impossible to manufacture or imitate love."

"Have to? Of course you have to! But only because of you, Harry, won't rest until Voldemort is finished! Think now, for once, if you have never heard of the prophecy! What would you do?"

"It was, he thought, the difference between being dragged into the arena to face a battle to the death and walking into the arena with your head held high. Some people, perhaps, would say that there was little to choose between the two ways, but Dumbledore knew - and so do I, thought Harry, with a rush of fierce pride, and so did my parents - that there was all the difference in the world."

"I don't mean to be rude—"he began, in a tone that threatened rudeness in every syllable."Yet, sadly, accidental rudeness occurs alarmingly often,"Dumbledore finished the sentence gravely."

"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."

"Am I about to discover where you, Ron, and Hermione disappeared to while you were supposed to be in the back room of Fred and George's shop?''How did you...?''Harry, please. You're talking to the man who raised Fred and George."

"Killing is not so easy as the innocent believe."

"Let us step into the night and pursue that flighty temptress, adventure."

"I am a wizard, not a baboon brandishing a stick."

"I am not worried, Harry,"said Dumbledore, his voice a little stronger despite the freezing water. "I am with you."