What exactly is the function of a rubber duck?

What was there to be gained by fighting the most evil wizard who has ever existed?" said Black, with a terrible fury in his face. "Only innocent lives, Peter!" "You don't understand!" whined Pettigrew. "He would have killed me, Sirius!" "THEN YOU SHOULD HAVE DIED!" roared Black. "DIED RATHER THAN BETRAY YOUR FRIENDS, AS WE WOULD HAVE DONE FOR YOU!

Muggles have garden gnomes, too, you know," Harry told Ron as they crossed the lawn. "Yeah, I've seen those things they think are gnomes," said Ron, bent double with his head in a peony bush, "like fat little Santa Clauses with fishing rods.

Harry looked around; there was Ginny running toward him; she had a hard blazing look in her face as she threw her arms around him. And without thinking, without planning it, without worrying about the fact that fifty people were watching, Harry kissed her. After several long moments, or it might have been half an hour-or possibly several sunlit days- they broke apart.

Why can’t I drink the potion instead?” asked Harry desperately. “Because I am much older, much cleverer, and much less valuable,” said Dumbledore.

Hope springs forever.

If he doesn't stop trying to save your life he's going to kill you.