At the moment when he answers Snape's call, he cannot know that Snape isn’t going to try and kill him. He can’t know that Snape will have the moral or physical courage to change course, let alone help defeat Voldemort. Yet still, Dumbledore goes to the hilltop.
-- J.K. Rowling (Hilltop)
“Why Dumbledore Went to the Hilltop”
Short essay in TwitLonger by J.K. Rowling in which Rowling discusses Dumbledore’s motivation for agreeing to meet with his enemy, Snape, on a lonely hilltop after Lily and James were killed.
Why Dumbledore Went to the Hilltop