Harry Potter and the Prisoner of Azkaban (Harry Potter, #3)

by J.K. Rowling

“You look in excellent health to me, Potter, so you will excuse me if I don’t let you off homework today. I assure you that if you die, you need not hand it in.”

“THEN YOU SHOULD HAVE DIED!” roared Black. “DIED RATHER THAN BETRAY YOUR FRIENDS, AS WE WOULD HAVE DONE FOR YOU!”

“You think the dead we have loved ever truly leave us? You think that we don’t recall them more clearly than ever in times of great trouble? Your father is alive in you, Harry, and shows himself most plainly when you have need of him. How else could you produce that particular Patronus? Prongs rode again last night.”