Kehlmann's theology, in our conversation, is richer than what we've often heard about authors playing God with their characters:
Any story puts me, as the writer of the story, into the godlike position of creating people to make their life difficult, to make them suffer because I have a plan for them. The plan is just to get the story as good as possible. There is a kind of teleology in getting the story right, because all the things happening to a character, causing pain to the character, ruining the life of this character, they are there for the greater good of getting a good story. And so this is exactly the same position in classical theology where the theologian tries to justify god: we are told that yes, you are suffering, but you are suffering because there is a plan. You might not understand this plan, maybe you never will, but you should trust that there is such a plan and that's why you should accept your suffering.
When I made Rosalie protest against this, and tell the writer "don't do this to me. I don't care about your plan," it wasn't just a metafictional game. It was a very real point that in the face of basic human suffering the whole idea of a bigger plan justifying all that seems ridiculous. To me this was a very serious theologically, philosophically charged story which also had a very personal twist because Rosalie is also telling the writer "one day all this will happen to you, you will be in pain, you will be dying, you will hope that somebody, against the plan, will just save you and it will not happen." It's true, and she was not just talking to some abstract writer, at this moment she was talking about me and the fact that it will happen to me too.
... Even when I started the story, I had always intended the ending that the writer interferes and ruins the story and saves the character. Then the writer also says "I hope someday somebody will do the same for me." I think, well, as you say in English, "fat chance!"
Daniel Kehlmann with Chris Lydon at the Harvard Bookstore, Cambridge, September 20, 2010