Introduction / R. G. Smith -- The Challenge of Dietrich Bonhoeffer's life and theology ; The first period: foundation ; The second period: concentration ; The third period : Liberation / E. Bethge -- From a letter to Superintendent Herrenbruck / K. Barth -- Dietrich Bonhoeffer and Karl Barth's positivism of revelation / R. Prenter -- 'The letters are a particular thorn' / W. Hamilton -- Bonhoeffer and the young Luther / R. Prenter -- The problem of the reception and interpretation of Dietrich Bonhoeffer / H. Muller -- The cross of reality? / H. Schmidt -- The idea of God and modern man / R. Bultmann.