Harry Potter and the Prisoner of Azkaban

"The wind changes, and we change with it."

"A wizard must never be left without hope."

"Those who choose not to believe in magic will never find it."

"The strongest connection we have is not one of flesh and blood, but of love and loyalty."

"It is our duty to try to protect those who cannot protect themselves."

"The past is a tricky thing."

"Not all magic is light, and not all dark magic is evil."

"There's no greater gift than the gift of time."

"Buckbeak's no more dangerous than a flobberworm, if you show proper respect."

"The castle will protect those within it."

"It is our choices that make us who we are."

"Some wizards just want to watch the world burn."

"You will find that I will only truly have left this school when none here are loyal to me."

"Knowing yourself is the beginning of all wisdom."

"The one thing Dementors cannot stand is laughter."

"It matters not what someone is born, but what they grow up to be."

"The truth is like a lion; you don't have to defend it. Let it loose; it will defend itself."

"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."

"Do not pity the dead, Harry. Pity the living."

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

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

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

"Understanding is the first step to acceptance, and only with acceptance can there be recovery."

"There's some good in this world and it's worth fighting for."

"To have been loved so deeply, even though the person who loved us is gone, will give us some protection forever."

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

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

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

"The past can't hurt you."

"We've all got both light and dark inside us. What matters is which we choose to act on."