Harry Potter and the Half-Blood Prince

"The mind is more powerful than any wand."

"Trust is earned through deeds, not words."

"The past is not dead, it lives in us."

"Memory is a curious thing."

"Love is the most powerful magic of all."

"Draco is not as much of a fool as his father."

"Tom Riddle is the most dangerous dark wizard of all time."

"Luck is a powerful thing, but it is not something to be relied upon."

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

"You care so much you feel as though you will bleed to death with the pain of it."

"It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived—in which case, you fail by default."

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

"It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends."

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

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

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

"One cannot be forever cautious."

"Curiosity is not a sin, but we should exercise caution with our curiosity."

"Memory is not what it always was."

"Voldemort himself created his worst enemy, just as tyrants always do."

"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."

"Ah, yes, Harry, you see the problem, don't you? I am afraid we must accept it."

"Youth cannot know how age thinks and feels. But in order to become old, you must first be young."

"The consequence of your choice will be the same as mine."

"Voldemort himself created his worst enemy, just as tyrants everywhere do."

"Love is the most powerful magic of all."

"It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all—in which case, you fail by default."

"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."