"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."
"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."
"To the well-organized mind, death is but the next great adventure."
"Call him Voldemort, Harry. Always use the proper name for things. Fear of a name increases fear of the thing itself."
"I hope you're pleased with yourselves. We could all have been killed - or worse, expelled. Now if you don't mind, I'm going to bed."
"So light a fire!"Harry choked. "Yes...of course...but there's no wood!"... "HAVE YOU GONE MAD!"Ron bellowed. "ARE YOU A WITCH OR NOT!"