But in a letter to Rössler, Bonhoeffer pushed the idea further: I have long thought24 that sermons had a center that, if you hit it, would move anyone or confront them with a decision. I no longer believe that. First of all, a sermon can never grasp the center, but can only itself be grasped by it, by Christ. And then Christ becomes flesh as much in the word of the pietists as in that of the clerics or of the religious socialists, and these empirical connections actually pose difficulties for preaching that are absolute, not merely relative.
