Discipleship costs, and its costs should be carefully considered so that one’s commitment is guided by wisdom. The cost is renunciation of the things of earth. A materialistic consumer culture is unsustainable. Of course there are a number of subsidiary issues here to distract us from our true purpose for being. What does it mean for us to please God so whole-heartedly? Slavery in general could be our reflection and what slavery to sin means, but this needs to handled skillfully if to be done well.