What are the motifs in To Own a Dragon: Reflections on Growing up Without a Father by Don Miller?

One recurring theme or motif is that of responsibility. Miller describes many of the challenges that face a boy who grows up without a father. A majority of the men in prison grew up without a father. Likewise, most of the children who drop out of school come from fatherless homes. Given such statistics, one feels a great sense of discouragement. In addition, Miller admits that no other person can take the place of one's father.