I would cut the “final lesson” line, I think it makes less sense in this version and would make the convo flow a little better. And the lines get a little more room to breathe.

“Pushing Ben toward the throne was my greatest fear. What are you most afraid of?”

“Myself.”

"Because you’re a Palpatine? The force made us, Rey, to end him.

Confronting fear is the destiny of a Jedi. Your destiny…"

I changed “that throne” to “the throne,” sounds a little more natural to me.