What are the motifs in Bonhoeffer: Pastor, Martyr, Prophet, Spy by Eric Metaxas?

A related thematic consideration is the book's contemplation of loyalty, in both its brighter and its darker manifestations, the one in fact counterpointing the other. In short, the loyalty displayed by Bonhoeffer, his family, his friends and his allies towards each other, towards God, towards their cause, and towards the oppressed (i.e. the Jewish people, others attacked by Hitler) is placed in powerfully contrasting juxtaposition to the loyalty that Hitler violently, intimidatingly demanded from his close allies and from the German people as a whole. The point here is that Bonhoeffer and those on the side of the resistance chose loyalty for reasons of faith and personal belief. Hitler, on the other hand, enforced