 A possibility (or purported possibility) that has not been considered so far, is that belief in divine revelation could be justified in a way that is totally sui generis. Inspired by Kierkegaard, Karl Barth seems to suggest something like this. Human nature is not in any way adapted to receive knowledge of God, according to Barth, and hence there can be no philosophical explanation of how knowledge of God comes about. However, God himself could provide such knowledge without respecting the criteria of any epistemological canon. Barth writers: