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

by J.K. Rowling

Never trust anything that can think for itself, if you can’t see where it keeps its brain.

If only there had been a dementor around. . . . As a sobbing Wood passed Harry the Cup, as he lifted it into the air, Harry felt he could have produced the world’s best Patronus.

“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.”