The Wanderer finds himself all alone on Bacu Island. Have you ever thought about what you would do in our real world if you were completely by yourself? He decides to be as he should anyway, not because of judgment or because anyone is asking him to.
The reason is that, whenever he loses himself, there is always a moment when he remembers what is right. And right is right, no matter what. It doesn't matter if you are the only one seeing it, doing it, or living it.