Narrative is a very feeble weapon in the face of human darkness and yet it's all we have. That we have to hang the transformation and survival of our species on the journey and transformation of one singular person so far outside of what we expect they can do.
I think that most writers who are trying to write important and difficult books are in many ways putting their own humanity into question. Sometimes the journey is finding out where you stand in relationship to your own humanity and to the humanity of others.