Harry Potter and the Half-Blood Prince

"It is a curious thing, Harry, but perhaps those who are best suited to power are those who have never sought it"

"Your mother was there for you at the end of your life. She died to save you"

"One cannot be half a Death Eater"

"I am not worried, Harry. I am not worried at all"

"Severus, please"

"The consequences of our actions are always so complicated, so diverse"

"Do not pity the dead, Harry. Pity the living, and, above all, those who live without love"

"Lily... after all this time?"

"You are not a bad person. You were placed in an impossible situation as a very young man"

"Memory is not what I am showing you now, Harry. I am showing you extracts from several memories"

"Dark and difficult times lie ahead. Soon we must all face the choice between what is right and what is easy"

"It is important to fight and fight again, and keep fighting, for only then can evil be kept at bay though never quite eradicated"

"It is our choices that show what we truly are, far more than our abilities"

"Help will always be given at Hogwarts to those who ask for it."

"We will have a need of you yet."

"I am not afraid of you."

"Your failures, though, have been more valuable."

"The truth must dazzle gradually."

"This is night, Draco."

"The Half-Blood Prince himself."

"Where shall I put it?"

"One cannot be wounded by dead things."

"It was indeed, a Horcrux."

"You cannot put an old head on young shoulders."

"I will not be going back."

"The power he knows not refers to love."

"I told you so."

"How can you be so thoughtless?"

"We've got to do something."

"I've already told you, I can't help you cheat."