And Dumbledore had known that Harry would not duck out, that he would keep going to the end, even though it was his end, because he had taken trouble to know him, hadn’t he? Dumbledore knew, as Voldemort knew, that Harry would not let anyone else die for him now that he had discovered it was in his power to stop it (…)
H.P and the Deathly Hallows - The Forbidden Forest (page 759 - Bloomsbury edition)


