Dumbledore

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

"Happiness can be found even in the darkest of times, if one only remembers to turn on the light."

"It does not do to dwell on dreams and forget to live."

"The truth is a beautiful and terrible thing, and should therefore be treated with great caution."

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

"Love is the most powerful magic of all."

"Courage is not the absence of fear, but rather the assessment that something else is more important than fear."

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

"There is nothing to fear but fear itself."

"Knowledge is power."

"Even miracles take a little time."

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

"Dark times lie ahead of us and there will be a time when we must choose between what is easy and what is right."

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

"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."

"Ah, music. A magic beyond all we do here."

"Understanding is a three-edged sword: your side, their side, and the truth."

"Peace is a more precious commodity than gold."

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

"Differences of habit and language are nothing at all if our aims are identical."

"Age is foolish and forgetfulness when it underestimates youth."

"Do not underestimate a man who has nothing left to lose."

"The mind is not a book to be read and copied out; it is more like a vast luminescent thing to be traversed."

"We must try to accept ourselves as we are: claymores, not toys; possibilities, not certainties."

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

"Curious thing, love. Especially love between two men."

"One can never have enough socks."

"I am not concerned with right and wrong. I am concerned with power."

"There is a type of magic beyond anything I have ever seen."

"Dumbledore is not concerned with right and wrong—he is concerned with power."