Sanctification

Sanctification is the progressive work of God and believers by which we are made holy and increasingly conformed to the image of Christ. It is a vital aspect of salvation, moving beyond the initial act of justification to encompass the whole of a Christian's life, shaping character and conduct.

This doctrine sits at the heart of Christian living because it addresses the practical outworking of our faith. While justification deals with our legal standing before God, sanctification concerns our moral transformation, ensuring that our inner being and outward actions increasingly reflect the holiness of God who has saved us.

What the Bible Teaches About Sanctification

Foundations in the Old Testament

The concept of holiness, from which sanctification derives, is deeply rooted in the Old Testament. God repeatedly calls His people to be holy because He is holy (Lev 11:44-45; 19:2). This holiness was initially expressed through separation—Israel was set apart from other nations, and certain objects, places, and people were consecrated for divine service. The temple, the priests, and sacrificial offerings were all 'sanctified' or made holy for God's purposes. This separation was not merely ceremonial; it demanded moral purity and adherence to God's laws, reflecting His character in their community life (Deut 7:6).

Fulfillment in the New Testament

In the New Testament, sanctification takes on a richer, more personal dimension through Christ and the Holy Spirit. Believers are declared holy in Christ (1 Cor 1:2), a positional holiness often called 'definitive sanctification.' Simultaneously, there is a progressive, experiential sanctification where believers are called to “work out your salvation with fear and trembling” (Phil 2:12), empowered by the Holy Spirit. Paul frequently exhorts believers to “be holy in all you do” (1 Pet 1:15), emphasizing a continuous process of growth in righteousness and putting off sinful habits (Rom 6:19-22; Eph 4:22-24). This ongoing transformation is a cooperative effort, with God working in us and us actively pursuing holiness.

The Historical Development of the Doctrine

Patristic Period and Early Controversies

Early Church Fathers like Augustine grappled with the relationship between grace and human effort in sanctification. Augustine emphasized God's sovereign grace in initiating and sustaining holiness, particularly in his debates against Pelagianism, which overemphasized human free will and the ability to achieve perfection without divine aid. While the term 'sanctification' was used, the focus was often on moral transformation and the role of sacraments in spiritual growth, laying groundwork for later distinctions.

Reformation and Confessional Clarity

The Reformation brought greater clarity to the doctrine, distinguishing sanctification from justification. Reformers like Martin Luther and John Calvin insisted that justification is a one-time declaration of righteousness by faith alone, while sanctification is a lifelong process of becoming righteous. The Westminster Confession of Faith (1646) articulated this clearly, defining sanctification as “a work of God's grace, whereby they who are effectually called and regenerated are further enabled, through the continual supply of strength from the Spirit of Christ, to die unto sin, and live unto righteousness.” This distinction became a hallmark of Reformed theology.

Different Christian Perspectives

Reformed/Evangelical View

The Reformed and broader evangelical tradition typically views sanctification as a progressive, lifelong process. It is a work of God's Spirit, enabling believers to grow in holiness and obedience, yet it also involves human effort and discipline (2 Cor 7:1; Heb 12:14). This view often emphasizes that while believers are positionally holy in Christ, they are not perfectly holy in practice until glorification. There is a real struggle against sin, but also a real, though imperfect, victory through the Spirit's power.

Other Major Traditions (Catholic, Orthodox, Arminian/Wesleyan, Pentecostal)

Catholic theology often integrates sanctification more closely with justification, viewing justification as a process that includes infused grace leading to actual holiness. The Eastern Orthodox tradition emphasizes theosis or deification, the process of becoming more like God through participation in His divine energies, a holistic transformation of the person. Arminian and Wesleyan traditions emphasize the possibility of entire sanctification or Christian perfection in this life, where believers can be freed from indwelling sin, though not from human error. Pentecostal views often align with Wesleyan perspectives, sometimes adding an emphasis on the empowering role of the Holy Spirit for holy living and spiritual gifts, often linked to a 'second work of grace.'

Why Sanctification Matters for Your Faith

Implications for Daily Christian Life

Understanding sanctification provides both comfort and challenge. It assures us that God is actively at work in our lives, shaping us into Christ's likeness, and that our struggles with sin are part of a larger divine purpose. It also calls us to active participation: to repent, to pursue righteousness, to engage in spiritual disciplines, and to rely on the Holy Spirit's power. It means that Christian growth is not optional but an expected outcome of genuine faith, leading to a life that increasingly honors God and blesses others.

Common Distortions to Avoid

One common distortion is 'antinomianism,' the belief that since we are saved by grace, our obedience to God's law doesn't matter. This misunderstands sanctification as a response to grace, not a means of earning it. Another distortion is 'legalism,' the attempt to achieve holiness through human effort alone, apart from the Spirit's power and grace. This leads to pride or despair. Finally, 'perfectionism' can lead to discouragement by demanding immediate, flawless holiness, ignoring the progressive nature of sanctification and the reality of ongoing spiritual warfare.

Conclusion

Sanctification is God's beautiful and ongoing work in us, transforming us from the inside out. It is a journey of grace, empowered by the Spirit, leading us to reflect more and more the holiness of Christ. It assures us that God is not only committed to saving us from sin's penalty but also from its power, making us truly new creations.