The mind is a complex and many-layered thing, Potter... or a... - J.K. Rowling, Harry Potter and the Order of the Phoenix

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

"From now on, I don't care if my tea leaves spell 'Die, Ron, Die,' I'm chucking them in the bin where they belong."

"Wit beyond measure is a man's greatest treasure."

"Well, we were always going to fail that one,"said Ron gloomily as they ascended the marble staircase. He had just made Harry feel rather better by telling him how he told the examiner in detail about the ugly man with a wart on his nose in the crystal ball, only to look up and realize he had been describing the examiner's reflection."

"My Head of House said I lacked certain necessary qualities...like the ability to behave myself."