 He later interpreted this confession favorably in light of several key teachings in the Book of Concord, especially the distinction between law and gospel.Because of pressure from the Gestapo, which he and his superiors received as a result of his public criticism of the German Christians ("Deutsche Christen"), Schlink was removed from his teaching position at Giessen.Between 1935 and 1939 he taught at the seminary in Bethel, near Bielefeld (see also Bethel Foundation).