The Transfiguration of Jesus is the turning point of Jesus’ ministry.
From preaching, teaching and healing in Galilee, after the Transfiguration he heads south to Jerusalem to confront the oppressive and exploitative religious establishment there.
The transfiguring light of Mt Tabor will progressively dim to the darkness of a cold tomb where Jesus’ dead body will be sealed after the crucifixion.
The disciples want to stay on the mountain in the glow. Who wouldn’t? But Jesus insists they must go and confront the darkness.