Paul’s explanation of Christ’s substitutionary death on the cross in the book of Romans was intended to establish the basis for believers being justified by faith. Paul said, “Therefore since we have been justified by faith, we have peace with God through our Lord Jesus Christ. Through him we have also obtained access by faith into this grace in which we stand, and we rejoice in hope of the glory of God” (Romans 5:1-2). Paul went on to say that because of one man’s trespass, death reigned, but those who receive Christ’s free gift of salvation will “receive the abundance of grace and the free gift of righteousness” and will reign in life (Romans 5:17). The Greek words thanatos (death) and zoe (life) were used by Paul to depict the two states of being that humans can exist in. “Often in the Septuagint, thanatos has the sense of destruction, perdition, misery, implying both physical death and exclusion from the presence and favor of God in consequence of sin and disobedience. Opposed to zoe (2222), life and blessedness (Septuagint: Deuteronomy 30:19; Proverbs 11:19; 12:28). In the New Testament, this sense is applied with more definitiveness to the gospel plan of salvation, and as zoe is used to denote the bliss and glory of the kingdom of God including the idea of a joyful resurrection, so thanatos is used for the opposite, i.e. rejection from the kingdom of God. This includes the idea of physical death as aggravated by eternal condemnation; sometimes with the idea of physical death being more prominent, and other times subsequent perdition being more prominent (John 8:51; Romans 6:16, 21, 23; 7:5, 10; 8:2, 6; 2 Corinthians 2:16; 3:7; 2 Timothy 1:10; Hebrews 2:15; James 5:20; 1 John 3:14; 5:16, 17). Called also the second death (Revelation 2:11; 20:6, 14; 21:8), referring to eternal spiritual separation from God” (G 2288). Paul concluded, “Therefore, as one trespass led to condemnation for all men, so one act of righteousness leads to justification and life” (Romans 5:18).

Paul’s explanation of what happens when a person is baptized indicated that just as Jesus Christ died and was raised back to life, so everyone who identifies himself with Christ’s death and resurrection will experience the same thing. Paul asked:

Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. (Romans 6:3-4)

Paul went on to explain that it is the believer’s union with Christ that causes him to be set free from sin and to walk in newness of life. Paul stated:

For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his. We know that our old self was crucified with him in order that the body of sin might be brought to nothing, so that we would no longer be enslaved to sin. For one who has died has been set free from sin. Now if we have died with Christ, we believe that we will also live with him. We know that Christ, being raised from the dead, will never die again; death no longer has dominion over him. For the death he died he died to sin, once for all, but the life he lives he lives to God. So you also must consider yourselves dead to sin and alive to God in Christ Jesus. (Romans 6:5-11)

Paul made note of the fact that one who has died has been set free from sin (Romans 6:7) and death no longer has dominion over him (Romans 6:9). Dominion refers to having absolute authority over someone (G2962). Jesus told his followers, “Truly, truly, I say to you, whoever hears my word and believes him who sent me has eternal life. He does not come into judgment, but has passed from death to life” (John 5:24). The Greek word that is translated set free in Romans 6:7 is dikaioo (dik-ah-yoˊ-o). This is the word that Paul used when he talked about being justified by faith (Romans 3:28, 30; 5:1). Therefore, being set from sin is related to God’s justification of those who put their faith in Christ.

Although justification by faith is a declaration that a person has been restored to a state of righteousness through belief and trust in the work of Christ rather than on the basis of his own accomplishment, Paul indicated that being set free from sin involves an act of one’s will. Paul instructed believers to, “Let not sin therefore reign in your mortal body, to make you obey its passions. Do not present your members to sin as instruments for unrighteousness, but present yourselves to God as those who have been brought from death to life, and your members to God as instruments for righteousness” (Romans 6:12-13). Presenting our members to sin has to do with us being in the immediate vicinity or proximity of something that we know is morally wrong and could cause us to sin. Instead, we must stay close to God and be ready and willing to do what he wants us to.

Paul equated being set free from sin to becoming slaves of righteousness. Paul explained:

What then? Are we to sin because we are not under law but under grace? By no means! Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness? But thanks be to God, that you who were once slaves of sin have become obedient from the heart to the standard of teaching to which you were committed, and, having been set free from sin, have become slaves of righteousness. I am speaking in human terms, because of your natural limitations. For just as you once presented your members as slaves to impurity and to lawlessness leading to more lawlessness, so now present your members as slaves to righteousness leading to sanctification.

Paul indicated that becoming slaves of righteousness leads to sanctification, the resultant state of purification that enables us to be holy as God is holy. “The only kind of sin whose power is broken in the lives of people is canceled sin—sin that has already been punished in Christ’s death and forgiven through faith. Thus is it necessary to fight sin in the strength and in the freedom of that gracious reality. Believers in Christ can be victorious over sin only because—and must be victorious over sin precisely because—Christ has conquered sin in them by virtue of his death and resurrection. As has already been implied, however, the believer enjoys this decisive victory over the dominion of sin as a result of union with Christ, his heart and life are not totally purified. Though the penalty of sin is paid and the power of sin is broken, the presence of sin still remains in the believer’s flesh and therefore must continually be put to death. Thus the sanctification that begins definitively at regeneration necessarily continues throughout the entirety of the Christian life. This continuous aspect of sanctification is called progressive sanctification” (Biblical Doctrine, MacArthur and Mayhue, p. 635).

Paul concluded his discussion of being set free from sin with a reminder of the spiritual endowment that believers receive as a result of being adopted into God’s family. Paul stated, “For when you were slaves of sin, you were free in regard to righteousness. But what fruit were you getting at the time from the things of which you are now ashamed? For the end of those things is death. But now that you have been set free from sin and have becomes slaves of God, the fruit you get leads to sanctification and its end, eternal life. For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord” (Romans 6:20-23). Paul linked sanctification to the end result or final outcome of eternal life. Revelation 21:1 tells us that after the second death, there will be a new heaven and a new earth, “for the first heaven and the first earth had passed away” and “the dwelling place of God is with man” (Revelation 21:3). John indicated God himself will be with his people, and “He will wipe away every tear from their eyes, and death shall be no more, neither shall their be mourning, nor crying, nor pain anymore, for the former things have passed away” (Revelation 21:3-4). The fact that former things have passed away is an indicator that in eternal life there will be no reminders of the sin that was once a part of our daily lives.