Someone pointed out that Kylo looks kind of like a bull here, so I went back to my Greek myths to see if there was anything interesting. And I came back with the story of the Minotaur.

‘In Crete, Minos’ daughter Ariadne fell madly in love with Theseus and helped him navigate the labyrinth. In most accounts she gave him a ball of thread, allowing him to retrace his path. Theseus killed the Minotaur with the sword of Aegeus and led the other Athenians back out of the labyrinth.’ -Wikipedia entry regarding the Minotaur’s defeat.

In this story, Ben is both Theseus and the Minotaur. He has to go into the labyrinth to destroy the monster and find his way back to the light using the thread of his connection to Rey. Palpatine and everything else are obstacles in the labyrinth that he must overcome, but at the end of the day, victory will be achieved when he defeats the monster that is himself.