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.
J. K. RowlingChess was the only thing Hermione ever lost at, something Harry and Ron thought was very good for her.
J. K. RowlingI heard from my dear friend Tiberius Ogden, that you can produce a Patronus? For a bonus point...? Harry raised his wand, looked directly at Umbridge, and imagined her being sacked. Expecto Patronum! The silver stag erupted from the end of his wand and cantered the length of the hall.
J. K. Rowling