The voice of the tempter does not come out of an abyss only recognized as ‘Hell’. It completely conceals its origin. It is suddenly near me and speaks to me. In paradise it is the serpent–quite plainly a creature of God–through whom the tempter speaks to Eve. Indeed there is no sign of the origin of the tempter in fire and brimstone. The denial of the origin belongs to the essence of the seducer.
–Dietrich Bonhoeffer, Creation and Fall: Temptation (New York: Simon and Schuster, 1997 ed. of the 1957 tr. of the 1955 German original), p.116 (emphasis mine)