In the book, Hull takes great effort to reunite the often disconnected theologies of justification and sanctification. He upholds obedience as defining discipleship -- that a disciple isn't merely one who obeys in order to be saved (justification) but one who continually obeys in order to grow into Christlikeness (sanctification).
The last chapter in the book is devoted to the impact of discipleship upon leadership. It is penetrating. Holding out the leadership example of Jesus and Paul, Hull poses several questions that have convicted my heart. If you happen to be in a "leadership" position, I hope these questions will give you pause as they have me:
Are you the kind of leader whose life has a positive effect on those around you? Who am I impacting for Christ from my life, not my position? If it were not my job to reach people for Christ, would I try? Is there any evidence outside of my professional efforts to prove it? Am I leading others by the example of my life (see 1 Peter 5.1-6; 1 Corinthians 11.1)?