"Cross and resurrection, suffering and the overcoming of death were central themes in Dietrich Bonhoeffer's exegetical and theological work. Again and again during his lifetime … he focused on these themes, trying to disclose their relevance for human life and actions, and to answer the question regarding just what Christian life really is."
January 1, 1970
https://en.wikiquote.org/wiki/Dietrich_Bonhoeffer