Only one thing mattered: this was not a Horcrux. Dumbledore had weakened himself by drinking that horrible potion for nothing. Harry crumpled the parchment in his hand and his eyes burned with tears as behind him Fang began to howl.

Imperfect understanding is often more dangerous than ignorance.

I just write what I wanted to write. I write what amuses me. It's totally for myself. I never in my wildest dreams expected this popularity.

Am I about to discover where you, Ron, and Hermione disappeared to while you were supposed to be in the back room of Fred and George's shop?" How did you...?" Harry, please. You're talking to the man who raised Fred and George.

Strange how short-sighted being invisible can make you.

... you could claim that anything's real if the only basis for believing in it is that nobody's proved it doesn't exist!

I felt I had to solve everyone's problems.