After his (DB) death the family entrusted me with his unpublished theological work in progress, the surviving parts of his library, and most of his papers. I eventually felt a sense of obligation to make his materials available, permitting a sounder interpretation of his life and work. This obligation arose at a point where the significance of his life and work transcended the private sphere and no longer belonged only to those close to him. 

~ Eberhard Bethge, Dietrich Bonhoeffer: A Biography (Revised Edition); Preface to the First English Edition (1970), xv.