Maturity

Ferguson wrote this study of spiritual maturity during his tenure as professor of systematic theology at Westminster Theological Seminary, addressing what he observed as widespread confusion about the nature and process of Christian growth. The work emerged from his conviction that many believers either despair of real progress in holiness or pursue it through methods that subtly undermine the gospel itself.

Ferguson argues that spiritual maturity is fundamentally about growing conformity to Christ rather than the accumulation of spiritual experiences or the mastery of disciplines. He traces the biblical pattern of sanctification as a Spirit-wrought transformation that flows from union with Christ, emphasizing that growth in grace involves both God's sovereign work and the believer's active participation. The book examines how spiritual immaturity often manifests in legalistic striving or antinomian passivity, both of which misunderstand the relationship between justification and sanctification. Ferguson demonstrates that true maturity involves learning to live increasingly from the reality of what God has already accomplished in Christ, while simultaneously pressing forward in obedience and Christ-likeness. He addresses practical obstacles to growth, including the role of suffering, the importance of biblical meditation, and the necessity of Christian community in the maturing process.

The work has remained influential in Reformed circles for its careful balance between theological precision and pastoral sensitivity, offering a framework for understanding sanctification that avoids both perfectionist expectations and antinomian complacency. Ferguson's synthesis of systematic theology and spiritual formation has made this a valued resource for pastors and teachers seeking to guide others in spiritual growth. Who should read this: Christians struggling to understand the relationship between faith and spiritual progress will find Ferguson's approach particularly helpful, though those from non-Reformed traditions may find his theological framework limiting.