What does the Bible mean when it talks about being a slave to sin?

from the old testament

• Proverbs 5:22 says of the person who is caught up in sin, “The iniquities of the wicked ensnare him, and he is held fast in the cords of his sin.” People sometimes think of sin as a type of freedom to “do what you want,” but in reality, sin enslaves those who practice it.
• Through the prophet Isaiah, God proclaimed liberty and freedom to those enslaved to sin (Isaiah 61:1).
• Our sins pull us down and bring us to ruin, as Judah’s sin brought about their “doom” (Jeremiah 4:18).

from the new testament

• The Jewish religious leaders thought their inheritance as descendants of Abraham testified to their freedom, but Jesus made it clear that whoever practices sin is a slave to it (John 8:34). True freedom comes only from abiding in Christ.
• The apostle Paul differentiates being subject to the Lord versus being subject to sin: “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?” (Romans 6:16).
• Before Christ, we “were dead in . . . [our] trespasses and sins” (Ephesians 2:1-3). Christians are covered in Christ’s righteousness, no longer slaves to sin, no longer bound for eternal separation from God.
• Paul describes to Titus their state before Christ: “For we ourselves were once foolish, disobedient, led astray, slaves to various passions and pleasures, passing our days in malice and envy, hated by others and hating one another” (Titus 3:3). As former slaves to sin, believers have the keys to unlock others from the prison of sin they are in: the Gospel.
• Sin can seem attractive, but it gains control over us. As the apostle Peter wrote, “For whatever overcomes a person, to that he is enslaved” (2 Peter 2:19).

implications for today

A slave, or doulos in the original Greek language of the New Testament, was a person who served the will of his or her master. Slaves to sin are those who are obligated to follow the will of sin (John 8:34); they have no power to leave their "master" on their own. People are slaves to sin both through their fallen human nature (often referred to by theologians as original sin) and through their actions.

However, Romans 6:17-18 shows that Jesus Christ frees us from sin, making us “slaves of righteousness." This new freedom comes as a gift. The cost of that gift was the death of Jesus Christ. Romans 6:6 shares, "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." The one who believes in Him is given eternal life (John 3:16).

Being freed from the slavery of sin is like being “brought from death to life” (Romans 6:13). Our response to God’s great love, grace, and mercy is to give our life to Him (Galatians 2:20).

How should we, as believers,respond when we sin? Scripture offers two helpful principles. First, we confess our sins, and God “is faithful and just to forgive us our sins and to cleanse us from all unrighteousness" (1 John 1:9).

Second, we realize that we will continue to struggle with sinful temptations as believers. Even with God's Spirit within us, our human weakness deals with desires that can cause us to stumble. Even the apostle Paul struggled, stating, "For I know that nothing good dwells in me, that is, in my flesh. For I have the desire to do what is right, but not the ability to carry it out. For I do not do the good I want, but the evil I do not want is what I keep on doing. Now if I do what I do not want, it is no longer I who do it, but sin that dwells within me" (Romans 7:18-20).

As believers, we are no longer slaves to sin. However, we will continue to struggle with sinful desires and temptations in this life. Our goal is to draw near to God, resist the devil (James 4:7-8), and to live according to God's ways in our new life in Christ.