Considering Christ’s supremacy and our new identity in Him, sinful habits just do not fit with believers. Christians are commanded to make war against any desires that reach ungodly proportions. This is the main argument Paul is making in these verses. There is a correlation between how prompt I am to put to death the earthly things (i.e. sinful desires and actions) in me and how much I value the glorious Christ and grasp the reality of my new self in Him. The Christian warfare will be burdensome, discouraging and debilitating if my love for Him is insignificant, if I do not make much of Jesus and do not realize how much He loves me. To grow in Gospel community, we need to separate ourselves from what is earthly in us and grow in the likeness of Jesus. This warfare will not succeed until it is fueled by the two main themes Paul is developing in Colossians: Christ's supremacy and our new identity in Him.