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

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

"And he knew that at that moment, they understood each other perfectly, and when he told her what he was going to do now, she would not say ‘be careful’ or ‘don’t do it’, but she would accept his decision because she would not have expected anything less of him."

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

"Oh, there you are, Albus,' he said. 'You've been a very long time. Upset stomach?''No, I was merely reading the Muggle magazines,' said Dumbledore. 'I do love knitting patterns."

"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 was supposed to be waiting up here when you got back, only your Phoenix lot got in the way...”“Yes, they do that,” said Dumbledore."

"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."

"What do I care how 'e looks? I am good-looking enough for both of us, I theenk! All these scars show is zat my husband is brave!"

"Don't count your owls before they are delivered."

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

"Yes, alive,” said Fudge. “That is — I don’t know — is a man alive if he can’t be killed? I don’t really understand it, and Dumbledore won’t explain properly — but anyway, he’s certainly got a body and is walking and talking and killing, so I suppose, for the purposes of our discussion, yes, he’s alive."

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

"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!"

"Sometimes you remind me a lot of James. He called it my 'furry little problem' in company. Many people were under the impression that I owned a badly behaved rabbit."