There is nothing about your sin that wants to help you along this journey, dear friend. It wants you to be as lame and crippled as you can possibly be as it sucks the very life out of you. It wants the world around you to see an unclear picture of Jesus—one that is insufficient, one that is weak and unable to save men’s souls. That’s what your sin wants.

Mortification of sin is not often discussed openly in churches these days. It sounds very Puritan. In a sense, it is. If anyone had a deep understanding of the reality of sin and its impact, it was the Puritans. What’s even more unfortunate is the dilution, perversion, and complete loss of the principle itself. Absence of the mortification of sin in the contemporary church, however, has not removed the principle from Scripture.

Put to death what Is earthly in you.

In his letter to the Colossians, Paul deals with the dynamic of our new nature versus the combative presence of the old:

If then you have been raised with Christ, seek the things that are above, where Christ is, seated at the right hand of God. Set your minds on things that are above, not on things that are on earth. For you have died, and your life is hidden with Christ in God. When Christ who is your life appears, then you also will appear with him in glory. (Col. 3:1-4)

The first four verses of chapter 3 talk about our new identity. It’s the substance of what life in Christ is. Paul frames his entire argument with “If you have been raised with Christ.” In other words, if we in fact have been made alive, these are his instructions with regard to remaining sin.

Put to death therefore what is earthly in you: sexual immorality, impurity, passion, evil desire, and covetousness, which is idolatry. On account of these the wrath of God is coming. In these you too once walked, when you were living in them. But now you must put them all away: anger, wrath, malice, slander, and obscene talk from your mouth. (Col. 3:5-8)

When Paul is laying these things out, he is not doing it in a way that is encouraging hypocrisy. He is not saying, “I want you to stop doing these things only so that you can appear moral and pious.” He’s saying, “I want you to put these sins to death, because as Jesus said, you are to be holy.” The sin in your life needs to be rendered completely helpless with regard to influencing your living and your relationship to God. Here are three reasons Christians work to mortify sin:

1. God’s wrath will be poured out on all unrighteousness.

When we mortify sin in our bodies and minds, we imitate the way our heavenly Father has mortified the wages of our sin through Christ.

The reason Christians struggle so deeply with the presence of unconfessed and unrepentant sin in their lives is because they know God sees it, they know what God is capable of toward it, and they know they are acting outside of their new identity.

Jesus did not die to allow God to shrug off our sin; he died to justify who we are before the holiness of God. The theologian R. C. Sproul says this about sin:

Sin is cosmic treason. Sin is treason against a perfectly pure Sovereign. It is an act of supreme ingratitude toward the One to whom we owe everything, to the One who has given us life itself. Have you ever considered the deeper implications of the slightest sin, of the most minute peccadillo? What are we saying to our Creator when we disobey Him at the slightest point? We are saying no to the righteousness of God. We are saying, “God, Your law is not good. My judgement is better than Yours. Your authority does not apply to me. I am above and beyond Your jurisdiction. I have the right to do what I want to do, not what You command me to do. (R. C. Sproul, The Holiness of God, p. 116)

If God is the ruler of this universe, there is nothing about sin that he, even as our Father, flagrantly dismisses. If that were true, there would be no need for sanctification.

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