Harry Potter and the Half-Blood Prince

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

"Well, you see, Horcruxes can only be destroyed by something so powerful and all-consuming that it can destroy even the darkest magic."

"I have been too lenient. Too accommodating. The time has come for Severus to act."

"Dumbledore believes it is our choices that show what we truly are, far more than our abilities."

"The consequences of our actions are always so complicated, so diverse, that predicting the future is a very difficult business indeed."

"I am not worried, Harry. I am with you."

"One cannot be half a Death Eater."

"Harry, I cannot tell you how sorry I am. I have known, for some time now, that you are not truly happy. You did not come to Hogwarts to be happy."

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

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

"Time is fleeting, and we must use it wisely"

"You are a resilient boy, Harry Potter"

"This is not magic, Harry. This is human nature"

"I am not worried about you reaching the school safely"

"The heart is a valuable organ, Harry. Do not underestimate its power"

"We must all face the choice between what is right and what is easy, but that choice may come too late"

"I would expect nothing less from you, Harry. Nothing less at all"

"Harry, I cannot stress too highly the importance of caution"

"I am deeply ashamed of myself. When I discovered what I had done"

"Horcruxes are not mere objects, Harry. They are manifestations of evil"

"There is nothing to be feared from a body, Harry. Nothing whatsoever"

"I see myself holding a pair of thick woolen socks"

"The connection between you and Voldemort is real and powerful"

"Those who are prepared to die for an idea are seldom killed for it"

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

"To the well-organized mind, death is but the next great adventure"

"Knowledge is power"

"There are other ways of destroying a man besides killing him"

"I have been careless, and so a student has died"

"We are only as strong as we are united, as weak as we are divided"