Sanctification as Set Apart and Growing in Christ

Sanctification: Set Apart and Growing in Christ — A Biblical Theology from Genesis to Revelation

What does it mean to be holy?

From the very first pages of Genesis to the final vision of Revelation, the entire sweep of Scripture tells one unbroken story — the story of a holy God who sets apart a people for himself and transforms them into his own image. This is sanctification. And it is not a minor theme tucked away in a few Pauline epistles. It is the heartbeat of the entire biblical narrative.

In Sanctification: Set Apart and Growing in Christ, biblical scholar Marny Köstenberger takes readers on a richly rewarding journey through the whole of Scripture — tracing the doctrine of sanctification from its roots in the eternal holiness of God, through the consecration of Israel, to its fulfilment in Christ and its ongoing work through the Holy Spirit in the lives of every believer.

This is not merely a doctrinal textbook. It is a window into the grand purposes of God — and an invitation to understand your own life of holiness within that glorious story.

The Heart of the Book

Köstenberger's central argument is both profound and practical:

Sanctification is not primarily about self-improvement — it is about restoration.

God created humanity in his image. Sin shattered that image. Now, through the death and resurrection of Christ and the indwelling work of the Holy Spirit, God is restoring his people to what they were always meant to be — image-bearers of the living God, set apart for his glory and sent out on his mission.

This means sanctification is:

• Rooted in Creation — grounded in the image of God in which humanity was made
• Accomplished in Christ — secured by his perfect life, atoning death, and resurrection
• Applied by the Spirit — the ongoing work of transformation in the believer's heart
• Forged through Suffering — holiness shaped and deepened in the midst of trial
• Directed toward Mission — equipping God's people for their calling in the world

A Truly Biblical Theology

What makes this book uniquely valuable is its whole-Bible approach. Rather than focusing only on New Testament passages about holiness, Köstenberger surveys the entire canon of Scripture — showing how sanctification unfolds progressively across both Testaments.

Readers will discover:

• How holiness is rooted in the eternal character of God himself — before creation, before Israel, before the cross
• How the Old Testament consecration of Israel anticipates and prepares for the New Testament work of the Spirit
• How the Hebrew and Greek words for sanctification illuminate the full meaning of what God is doing in his people
• How the Old and New Testaments relate to one another on this central theme — not as contradiction but as promise and fulfilment
• How suffering is not an obstacle to sanctification but one of God's primary instruments for producing it

What This Book Will Help You Do

• Understand sanctification as a whole-Bible theme rather than an isolated doctrine
• Grasp the Hebrew and Greek roots of sanctification for deeper biblical literacy
• See your personal growth in holiness as part of God's grand redemptive story
• Understand how the Old and New Testaments connect on the theme of holiness
• Find hope and purpose in suffering as a God-ordained means of sanctification
• Live with a greater sense of identity, mission, and calling as one set apart by God
• Teach or explain sanctification with biblical depth and narrative clarity

Who Should Read This Book?

Sanctification: Set Apart and Growing in Christ is ideal for:

• Christians at every stage of growth who want to understand what holiness really means
• Bible study leaders and small group facilitators seeking a theologically rich, accessible resource
• Pastors and preachers wanting a concise biblical theology to inform their teaching
• Seminary and Bible college students studying biblical theology or systematic theology
• New believers who want to understand what God is doing in their lives through the process of sanctification
• Anyone walking through suffering who needs to understand how God uses trials to produce holiness
• Readers of the Short Studies in Biblical Theology series building a comprehensive biblical theology library

About the Short Studies in Biblical Theology Series

Sanctification is part of the celebrated Short Studies in Biblical Theology series — a collection of concise, accessible volumes that trace key biblical themes across the whole of Scripture. Each book is designed to help readers see how the Bible's individual parts form one unified, Christ-centred story.

Other volumes in the series include:

• Resurrection Hope and the Death of Death
• The Sabbath as Rest and Hope for the People of God
• And many more

Collecting the full series equips readers with a comprehensive biblical theology that enriches personal study, preaching, teaching, and Christian living.

Why Sanctification Matters Right Now

In a culture that prizes self-expression over self-denial and comfort over consecration, the doctrine of sanctification is more countercultural — and more necessary — than ever. Christians need to understand not just that God saves them, but what he is saving them for — and what he is saving them into.

Sanctification: Set Apart and Growing in Christ answers those questions with biblical richness and pastoral sensitivity, reminding every believer that the holy God who called you is also the faithful God who is completing what he began — from Genesis to Revelation, from your new birth to your glorification.

"The entire biblical narrative declares the righteousness of God and the consecration of his people."