A fragmentary life

At my church we've been studying parts of Dietrich Bonhoeffer's The Cost of Discipleship [Nachfolge]. My pastor pointed out a passage in the brief "Memoir" of Bonhoeffer's life prefacing the book in which G. Leibholz writes that

Bonhoeffer often asked himself about the deeper meaning of his life, which seemed to him so disconnected and confused. A few months before his death. . . [for plotting to kill Hitler], he wrote in prison:

"It all depends on whether or not the fragment of our life reveals the plan and material of the whole. There are fragments which are only good to be thrown away, and others which are important for centuries to come because their fulfillment can only be a divine work. They are fragments of necessity. If our life, however remotely, reflects such a fragment . . . we shall not have to bewail our fragmentary life, but, on the contrary, rejoice in it." (p. 34)