 Rösch introduced Delp to the Kreisau Circle.As of 1942, Delp met regularly with the clandestine group around Helmuth James Graf von Moltke to develop a model for a new social order after the Third Reich came to an end.Delp's role was to explain Catholic social teaching to the group, and to arrange contacts between Moltke and Catholic leaders, including Archbishop Konrad von Preysing of Berlin and Bishop Johannes Dietz of Fulda.