Here is the call of Christ. Now it works at two levels and to really benefit from this passage you have to see the two levels and apply it to both of them.
Has the old man come back? Have you been unkind to husband, wife? Have you reacted in a hostile, ill-tempered way? Are you dishonest in any respect, or unclean, looking at things that are foul and filthy and unclean? Every day examine your heart: ‘Oh Lord, what have I done? Cleanse me and forgive me.’ Hate it and root it out. Identify the sin: step one. Step two: determine to defend yourself against it. Step three: pray for the help of God, that is vital. Step four: hate it; it helps you to hate the sin that you are about to commit or have committed. Step five: mortify it, put it to death, put it away. That is taking off the old clothing. That is sanctification and God will strengthen us and help us.
Just as there is a progression in sinfulness and the old man does not stand still for long, so there must be progress to be made in the Christian life. The flesh grows more corrupt over time because it is egged on by the lusts which it is unable to resist. Every yielding to sin produces a deeper enslavement to it and a further corruption of the heart. Sin is not as sinful as it can possibly be at the start of life, but it advances as it urges us to satisfy our carnal appetites. It operates by deception. It does not blatantly say to us, come and enjoy my pleasures and you will receive death in exchange. It hides the consequences from us until the hook is well and truly embedded in our souls. But at conversion, the sinful nature was dealt a mortal blow and God created a new nature in us. We willingly repented of our sins and wholeheartedly approved the death of the old nature, the termination of all future participation in sin and made no provision for any possible return to it. Repentance begins the life of faith and is in a profound sense an end to the life of sin. We are made willing for the Spirit of God to strike that death blow against the man that we were and to end the rule of sin in our lives. We begin a new allegiance to Christ in which we accept him as Lord over all our words, deeds and thoughts.