There is a growing trend among some well-meaning teachers and preachers today to emphasize the need to kill sin—to crucify the flesh, to wage war against indwelling corruption. And make no mistake, Scripture is clear: sin must be put to death (Romans 8:13; Colossians 3:5). Yet, there is a danger when the pursuit of mortification becomes disconnected from the Person of Jesus Christ. When “killing sin” becomes the primary goal rather than the byproduct of a deeper pursuit—namely, putting on Christ—we have stepped off the narrow road of gospel holiness and into the wide ditch of religious moralism.
“But put on the Lord Jesus Christ, and make no provision for the desires of the flesh.” – Romans 13:14 (BSB)
Moralism may clean the outside of the cup, but it leaves the heart unchanged. It is the old man dressing up in new clothes. It is self-discipline without the Savior. And tragically, it can leave a soul just as lost and empty as open rebellion.
The Danger of Half a Gospel
There is something deeply appealing about a message that focuses exclusively on behavior management. It gives us something to do, something to measure, something that feels spiritual. But the gospel is not a self-improvement project. It is not behavior modification. It is not about not sinning; it is about being made new in Christ (2 Corinthians 5:17).
The gospel does not stop at sin’s death—it proclaims the life of Christ in us. The danger of a sin-killing-only message is that it turns the Christian life into a constant fight without joy, a struggle without intimacy, a battle without a Captain.
We were not saved to spend our days in the graveyard of sin, hacking away at old bones. We were raised with Christ to walk in newness of life (Romans 6:4), not merely to avoid the shadows of the old one.
Christ Is the Goal
Paul’s aim was never just that believers would stop sinning. His passion was “that I may know Him” (Philippians 3:10), and “that Christ may be formed in you” (Galatians 4:19). Holiness is not the absence of bad habits—it is the presence of Christ.
When Paul calls the church to “put on the new self,” he is not inviting us to moral reform. He is calling us to something far more beautiful: “Put on the new self, created to be like God in true righteousness and holiness” (Ephesians 4:24, NLT). And how do we do that? He clarifies in Romans 13:14, “Put on the Lord Jesus Christ.”
Jesus is not merely the one who helps us kill sin. He is our righteousness. He is our sanctification. He is the One who pleases the Father on our behalf. The Christian life is not merely a sinless one—it is a Christ-filled one.
Holiness is Christlikeness, Not Just Clean Living
Too often, holiness is presented as a list of “don’ts.” But true holiness is imaging Christ. It is being conformed to His likeness (Romans 8:29). It is not just being less like the world, but being more like Jesus.
If our teaching focuses only on sin without holding up the beauty and sufficiency of Christ, we leave our people with rules instead of relationship. The human heart was never meant to be fueled by duty alone. We were made to delight in a Person.
Killing sin is necessary, yes—but it is only effective when it flows from a heart captivated by Christ. Victory over sin comes not by looking inward at our efforts, but upward to the One who loved us and gave Himself for us (Galatians 2:20).
The Power to Change Is a Person
We must teach this clearly: the power to put sin to death is not found in greater resolve or accountability groups alone—it is found in our union with Christ.
“Since you have been raised to new life with Christ, set your sights on the realities of heaven… For you died to this life, and your real life is hidden with Christ in God.” (Colossians 3:1–3, NLT)
This is positional sanctification. We are not trying to earn favor or improve ourselves—we are resting in our new identity in Christ, drawing from His life, leaning on His Spirit, abiding in His Word.
When we forget this, we drift into legalism. We may become better-behaved sinners, but we are not being transformed into the image of the Son. That is not true holiness.
A Word to the Church
Dear saints, do not settle for moralism dressed up in biblical language. Do not confuse external conformity with inward transformation. Fight sin, yes—but never apart from the gospel. Never apart from Christ. Let every effort toward holiness be rooted in His love and energized by His Spirit.
When you rise in the morning, don’t just say, “Today I will avoid lust, pride, anger, or greed.” Say instead, “Today, I will fix my eyes on Jesus. I will learn of Him. I will abide in Him. I will put on Christ.”
For when Christ is formed in us, sin loses its power. When He becomes our treasure, the false joys of sin are exposed. When we walk in the Spirit, we do not gratify the desires of the flesh (Galatians 5:16).
A Word to the Lost
If you are outside of Christ, hear this: the message of Christianity is not “clean up your life.” The message is: “Come to Me, all who are weary and burdened, and I will give you rest” (Matthew 11:28, BSB). Christ does not call you to religion—He calls you to Himself.
Your greatest need is not behavior change but heart transformation. You need new life. And that life is found in Jesus Christ alone.
Turn from your sin, yes—but turn to the Savior. Receive His mercy. Trust in His finished work. And you will not only be forgiven—you will be made new.
Conclusion:
Killing sin is necessary, but it is not the end. It is a fruit, not the root. The heart of true holiness is not found in what we avoid, but in whom we embrace. And the One we embrace is Christ.
Put on Christ, beloved. Learn of Him. Abide in Him. And you will find that the life of holiness you long for is not a result of your striving, but of His indwelling life.
“Christ in you, the hope of glory.” – Colossians 1:27 (BSB)