"His priority did not seem to be to teach them what he knew, but rather to impress upon them that nothing, not even... knowledge, was foolproof."
"Youth can not know how age thinks and feels. But old men are guilty if they forget what it was to be young."
"Wit beyond measure is a man's greatest treasure."
"My Head of House said I lacked certain necessary qualities...like the ability to behave myself."
"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."
"It unscrews the other way."