Paul is fighting hard for the Colossians to fully understand what they have in Christ. So he begins warning them: they have everything they need in Christ to live a full and complete life because He holds all wisdom and knowledge, is God in the flesh, and is over every spiritual power. Thus, they must not let anyone rob them with the world’s deceitful dogma. That’s where they used to live, but Jesus has stripped them of this dead body and clothed them with His. They no longer owe a debt to the world’s dogma or the spiritual powers behind it, in fact, Jesus has disarmed them. Therefore, they should not subject themselves to it as if the world is their home. All these man-made rules sound great, but they only address outward behavior. They can do nothing about the evil desires within.