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

by J.K. Rowling

“Believe me,” croaked Black. “Believe me, Harry. I never betrayed James and Lily. I would have died before I betrayed them.”

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

“I’m not doing this for you. I’m doing it because I don’t reckon my dad would’ve wanted his best friends to become killers — just for you.”

“We’ll see each other again,” he said. “You are — truly your father’s son, Harry. .

“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.”