What happened down in the dungeons between you and Professor... - J.K. Rowling, Harry Potter and the Sorcerer's Stone

"Alas! Earwax!"

"One can never have enough socks,"said Dumbledore. "Another Christmas has come and gone and I didn't get a single pair. People will insist on giving me books."

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

"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."

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