Sanctification

What does sanctification mean in the Bible?

Sanctification means to be made holy, set apart for God and, in the believer, increasingly separated from sin. Jesus prays it directly over his disciples: “Sanctify them by the truth; Your word is truth” (John 17:17). Scripture speaks of believers as already sanctified, and it speaks of them as being sanctified: a decisive breach with sin’s dominion made once at conversion, and a continuing transformation worked out over a lifetime, sometimes called progressive sanctification. Both are true of every believer at once. Underneath both stands a single, non-negotiable order: justification is the ground of the believer’s acceptance before God, and sanctification is the necessary fruit of that salvation, never its ground.

What’s the difference between justification and sanctification?

Justification and sanctification are not the same act, and Scripture is careful to keep them distinct even while naming them together. Paul writes to the Corinthians, “such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ and in the Spirit of our God” (1 Corinthians 6:11). Justification is God’s legal verdict, declaring a sinner righteous once for all on the basis of Christ’s righteousness credited to him. Sanctification is God’s work of setting the believer apart as holy in Christ and progressively making him holy in life and character. Justification concerns the believer’s righteous standing before God. Sanctification sets him apart for God and increasingly changes his life and character. Paul states the order plainly: “by grace you have been saved through faith, and this not of yourselves, it is the gift of God; not of works, so that no one may boast,” and then, in the very next breath, “we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand so that we would walk in them” (Ephesians 2:8-10). Justification is entirely apart from our works. Sanctification follows as the necessary fruit of that salvation. God does not justify a sinner because he is becoming holy. He justifies entirely through faith in Christ, and the salvation that justifies him also produces sanctification. Collapsing the two together, making a person’s growth in holiness part of the ground of his acceptance with God, is exactly the confusion the Reformation had to sort out on the justification side of this same doctrine.

Is sanctification something God does, or something I do?

Both, and Scripture will not let either half go. Sanctification begins as God’s own act. Hebrews says of Christ’s sacrifice, “by one offering He has perfected for all time those who are being sanctified” (Hebrews 10:14): the sacrifice is completed once for all, but the sanctification it secures continues in those for whom Christ died. Those same believers are also commanded to pursue sanctification themselves: Hebrews later calls the church to pursue “peace with all men, and the sanctification without which no one will see the Lord” (Hebrews 12:14). Paul holds both truths in one sentence: “work out your salvation with fear and trembling; for it is God who is at work in you, both to will and to work for His good pleasure” (Philippians 2:12-13). Sanctification is God’s grace producing the believer’s obedience, not the believer’s obedience earning more of God’s grace.

Has sin’s power already been broken over the believer?

Yes. Believers are not only being sanctified over time; Scripture also says they were sanctified, decisively, the moment they were united to Christ. Paul tells the Corinthians they “were sanctified” (1 Corinthians 6:11), past tense, a completed fact about every believer no matter how immature. Romans 6 explains what that decisive break actually means: “How shall we who died to sin still live in it?” (Romans 6:2), because “our old man was crucified with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin” (Romans 6:6). This is more than a change of status. It is a real breach with sin’s dominion: the believer united to Christ is no longer enslaved to sin as his master, even though sin remains present and must still be fought.

What is progressive sanctification?

Progressive sanctification is the lifelong, ongoing side of the same work: the Spirit putting sin to death in the believer and bringing forth the life of the new creation in him. Paul describes it as unfinished and unfolding: believers “are being transformed into the same image from glory to glory” (2 Corinthians 3:18). It is worked out through real, daily effort, empowered by God rather than independent of him: “if by the Spirit you are putting to death the practices of the body, you will live” (Romans 8:13). This is the pursuit Hebrews 12:14 commands and Philippians 2:12-13 describes: not earning more favour with God, but the Spirit conforming an already-accepted, already-set-apart believer to Christ’s likeness, one degree at a time. Justification removes the guilt of sin. Union with Christ breaks its dominion. Progressive sanctification increasingly puts remaining sin to death. Glorification removes its presence entirely.

What is positional sanctification?

Positional sanctification is the believer’s status as one who has been set apart for God in Christ. Scripture can therefore speak of Christians as already sanctified before describing their growth in holiness. Paul writes to the Corinthians, “you were sanctified” (1 Corinthians 6:11), and addresses the same church as “those who have been sanctified in Christ Jesus, called as saints” (1 Corinthians 1:2). Their conduct was still deeply flawed, but their belonging had changed: they had been set apart as God’s holy people in Christ.

This positional sanctification does not mean that the believer has already become perfectly holy in conduct. It describes what God has made him in relation to Himself. He belongs to Christ, has been set apart from the world as God’s possession, and is therefore called a saint, a holy one. Progressive sanctification follows from that new position, as the Spirit increasingly brings the believer’s life into conformity with what he already is in Christ. The believer does not become God’s holy possession by successfully sanctifying himself; he pursues holiness because God has already set him apart as His own.

Does sanctification improve the flesh?

No. Sanctification is not God gradually rehabilitating the flesh until it becomes righteous. Paul does not describe the beginning of the Christian life that way. Before conversion, he says, believers “were dead in transgressions and sins” (Ephesians 2:1), and God, “even when we were dead in our transgressions, made us alive together with Christ” (Ephesians 2:5). The beginning of the Christian life is resurrection, not rehabilitation: God does not take the old fallen man and gradually improve him, he makes him alive. When Paul speaks of “the flesh” in passages such as Galatians 5 and 6, he is not simply referring to the physical body. He is describing fallen, sinful nature and desire, in opposition to the Spirit. The body itself is not evil. Paul commands believers to present their bodies “a sacrifice, living, holy, and pleasing to God” (Romans 12:1), and the body will be raised. But the flesh, in this ethical sense, and the Spirit remain opposed for as long as the believer lives in this age: “the flesh sets its desire against the Spirit, and the Spirit against the flesh; for these are in opposition to one another” (Galatians 5:17). The flesh is not reformed. It is refused, and its verdict never changes: “the one who sows to his own flesh will from the flesh reap corruption” (Galatians 6:8). The flesh never becomes the source of holiness. What changes is the believer’s relation to the flesh. He is no longer under sin’s dominion, enslaved to the flesh as its master; he walks by the Spirit and puts its deeds to death. Paul states it as an accomplished fact for everyone who belongs to Christ: “those who belong to Christ Jesus crucified the flesh with its passions and desires” (Galatians 5:24). Sanctification does not train the flesh to behave. By the Spirit, the believer puts its deeds to death, refuses it, and lives instead out of what he has become in Christ, a new creation: “neither is circumcision anything, nor uncircumcision, but a new creation” (Galatians 6:15). Sanctification, then, is not Christian self-improvement, a slow polishing of the old self into something better. It is the Spirit bringing forth the life of the new creation in those who already belong to Christ, as they put to death the deeds of the flesh and increasingly walk in obedience to God.

Why is sanctification often slow and difficult?

Because sanctification takes place in the middle of an ongoing war between the flesh and the Spirit. Paul names the conflict directly: “the flesh sets its desire against the Spirit, and the Spirit against the flesh; for these are in opposition to one another, so that you do not do the things that you want” (Galatians 5:17). Hebrews compares the difficulty to discipline a father gives a son precisely because he loves him, evidence of sonship rather than rejection (Hebrews 12:5-11). Sanctification often advances slowly because remaining sin still resists the Spirit, but the struggle itself does not mean God’s work has failed. Hebrews’ warning still stands in its full force: “Pursue peace with all men, and the sanctification without which no one will see the Lord” (Hebrews 12:14). Hebrews does not make sanctification the price of seeing God. Christ alone secures the believer’s acceptance. Rather, the verse teaches that holiness necessarily marks those whom God has saved. A profession of faith accompanied by no pursuit of holiness gives no biblical basis for confidence that the person belongs to Christ. Hebrews’ own answer to discouragement in the middle of the fight is to fix eyes on Jesus, “the author and perfecter of faith” (Hebrews 12:2), the one of whom Paul can say elsewhere, “He who began a good work in you will perfect it until the day of Christ Jesus” (Philippians 1:6).

Is sanctification a second, separate work of grace after conversion?

No. Some Wesleyan and Holiness traditions teach a distinct crisis experience of entire sanctification after conversion. Scripture does not describe sanctification that way. Hebrews speaks of believers as those who “are being sanctified” (Hebrews 10:14), while the rest of the New Testament repeatedly describes an ongoing conflict with sin and continuing growth in holiness, not a single decisive experience that settles the matter this side of glory. Paul’s letters likewise address ongoing, unfinished sanctification to entire churches, including the Corinthians, a congregation he elsewhere corrects for serious and persistent sin while still calling them sanctified in Christ (1 Corinthians 6:11). Sanctification is not achieved in a second, separate crisis distinct from conversion. It is the same Spirit who unites a sinner to Christ at the moment of saving faith continuing that same work, begun in a decisive breach with sin and carried forward progressively, without interruption until glory.

Sanctification is not incidental to salvation. Paul states it as God’s express purpose: “this is the will of God, your sanctification: that you abstain from sexual immorality” (1 Thessalonians 4:3). Sanctification is not an abstract spiritual state; it involves putting actual sin to death in the concrete details of a life. Christ “gave Himself for us, that He might redeem us from all lawlessness, and purify for Himself a people for His own possession, zealous for good works” (Titus 2:14). Christ’s saving work does not leave the people he redeemed unchanged. Those he saves become his own people, purified for him and zealous for good works. Their holiness does not purchase that redemption. It is the fruit of belonging to the Redeemer who purchased them. Follow how this theme develops through the Bible.