Greatness inspires envy, envy engenders spite, spite spawns lies.

“Oh, he knows how to play, little bitty baby Potter.”

“And the Slytherins don’t need a spy, Oliver,” said George. “What makes you say …”

“The mind is not a book, to be opened at will and examined at leisure. Thoughts …”

“Neville will play Quidditch for England before Hagrid lets Dumbledore down.”