He didn't realize that love as powerful as your mother's for... - J.K. Rowling, Harry Potter and the Sorcerer's Stone

"No, thanks,"said Harry. "The toilet's never had anything as horrible as your head down it— it might be sick."Then he ran, before Dudley could work out what he'd said."

"Ah, music,"he said, wiping his eyes. "A magic beyond all we do here!"

"Your mother died to save you. If there is one thing Voldemort cannot understand, it is love. Love as powerful as your mother's for you leaves it's own mark. To have been loved so deeply, even though the person who loved us is gone, will give us some protection forever."

"There are some things you can't share without ending up liking each other, and knocking out a twelve-foot mountain troll is one of them."

"There is no good and evil, there is only power and those too weak to seek it."