What does the Bible say about letting sin reign?

In Romans 6:12-13, the apostle Paul exhorts believers not to allow sin to reign in their mortal bodies, emphasizing that as those alive in Christ, they are to yield themselves to God as instruments of righteousness. This command stems from the reality that all believers wrestle with the presence of sin in their lives. Paul highlights that while we may struggle against sin, we are assured that there is 'therefore now no condemnation for those who are in Christ Jesus' (Romans 8:1). Thus, the admonition to not let sin reign is both a loving command and a necessary reminder of our new identity in Christ.