A common question among believers is: If Christians still struggle with sin, why does Scripture say sin has no dominion over us? The answer is found in Romans 6:14: “For sin shall not have dominion over you, for you are not under law but under grace.”
This freedom is not based on a believer’s perfect conduct or the absence of temptation. It is based entirely on what Christ accomplished on the cross.
1. The Law Gave Sin Its Power to Condemn
Under the law, sin has legal authority to accuse and condemn. The law reveals sin, exposes guilt, and carries the sentence of death (Romans 7:7-11). When a person is under the law, sin reigns through that condemnation. It holds a person in bondage not only by its presence but by its penalty.
2. Christ Defeated Sin at Its Root
On the cross, Jesus dealt with sin in its entirety — its cause, source, and system. He bore the penalty and broke its power. Through His atoning sacrifice, the claim of sin over the believer was nullified. Romans 6:6 explains that our “old self was crucified with Him so that the body of sin might be rendered powerless.”
This means the ability to sin may still exist, but sin no longer has mastery or ownership over the believer. He is no longer its slave.
3. The Believer Is Now Under Grace
Grace is not a license to sin. It is a new covenant where condemnation has been removed and righteousness has been freely given. Being “under grace” means a believer’s standing before God is no longer based on performance but on Christ’s finished work.
Because of this, the believer is dead to sin and alive to God (Romans 6:11). Dead to sin means dead to its authority and claims. Alive to God means living in union with Christ, empowered by His Spirit to walk in holiness and righteousness. This new position is what makes holiness possible — not the other way around.
4. The Result: Reigning in Life
Romans 5:17 ties it together: those who receive the abundance of grace and the gift of righteousness will “reign in life through the one man, Jesus Christ.” This is not a life of striving to earn acceptance, but a life lived from a place of sonship and security in Him.
Sin may still be present, but it no longer rules. The believer’s identity has shifted from being “in Adam” — under condemnation — to being “in Christ” — under grace, alive, and free.
In summary:
Sin has no dominion over a Christian not because he never sins, but because Christ has already conquered sin’s power. The believer’s new identity in Christ makes him dead to sin’s authority and alive to God’s righteousness. Grace is the ground he stands on, and from that ground he reigns in life, believing: “I am the righteousness of God in Christ Jesus.” (2 Corinthians 5:21).