Van A. Harvey, The Historian and the Believer (New York: Macmillan, 1966), p. 249. This dictum has been called “Lessing’s ugly ditch,” because its effect has been to separate faith from reason, and it was accepted by the philosophers Lessing and Kierkegaard, by the late-19th-century Christian theologians Wilhelm Hermann and Martin Kahler and by such diverse dialectical theologians as Karl Barth and Rudolf Bultmann.