Mistletoe," said Luna dreamily, pointing at a large clump of white berries placed almost over Harry's head. He jumped out from under it.
"Good thinking," said Luna seriously. "It's often infested with nargles.

The singing grew louder as they approached the church. It made Harry’s throat constrict, it reminded him so forcefully of Hogwarts, of Peeves bellowing rude versions of carols from inside suits of armour, of the Great Hall’s twelve Christmas trees, of Dumbledore wearing a bonnet he had won in a cracker, of Ron in a hand-knitted sweater…

When we come face-to-face with one down a dark alley, we're going to be having a shufti to see if it's solid, aren't we, we're not going to be asking, 'Excuse me, are you the imprint of a departed soul?

By all means continue destroying my possessions. I daresay I have too many.

Yeah, Quirrell was a great teacher. There was just that minor drawback of him having Lord Voldemort sticking out of the back of his head!

They had reached Lockhart's classroom...'You could've fried an egg on your face" said Ron. 'You'd better hope Creevey doesn't meet Ginny, or they'll be starting a Harry Potter fan club.'
'Shut up,' snapped Harry. The last thing he needed was for Lockhart to hear the phrase 'Harry Potter fan club.