Summary
This book explores a central expression of faith, calling on the name of the Lord. It treats that phrase as more than a religious slogan. Instead, it is presented as a thread running through Scripture that reveals what true worship is, what saving faith looks like, and how the people of God live as those who depend on divine mercy. The approach is biblical theological. It aims to show the shape of the theme across the canon rather than offering a narrow study of one passage.
The writing is direct and pastor friendly. It invites the reader to see calling on the Lord as a covenantal reality, tied to promise, prayer, confession, and public allegiance. This makes it useful for preachers, because the theme naturally sits at the intersection of doctrine and devotion. It can shape sermons on prayer, assurance, mission, and the nature of the church.
Strengths
First, the theme is handled with a strong instinct for Scripture. The author shows how the phrase functions in key moments of the biblical story, not as a decorative line, but as a marker of true worship and saving dependence. That helps readers avoid sentimentalising prayer. Calling on the Lord is presented as an act of faith in a speaking God, grounded in promise and expressed in worship. For pastors, this gives a helpful way to speak about prayer as covenant communion rather than a technique for getting results.
Second, the book brings together a cluster of pastoral concerns. It connects calling on the Lord with repentance, assurance, and mission. The result is a theme that can be applied in many directions without being forced. For example, it helps clarify the difference between casual religious talk and genuine faith. It also helps a church see that to call on the Lord is to take refuge in him, which has implications for how we handle suffering, temptation, and anxiety.
Third, it strengthens preaching by offering a framework for tracing a theme with integrity. Many preachers want to preach biblical theology but fear losing the text. This volume models a way to do it, by attending to the words, their contexts, and their function in the storyline. It gives you confidence to show congregations that the Bible is not a loose anthology, but a unified witness to the Lord who saves.
Limitations
As with other thematic studies, the book must be paired with close exegesis when preparing sermons on specific passages. It will not do the line by line work for you, and it does not aim to handle every debated detail. Some readers may wish for more sustained engagement with alternative scholarly readings of key texts.
In addition, the theme can be so broad that the reader might want sharper guidance on application in particular pastoral scenarios. The author provides strong principles, but the pastor still needs to make the pastoral turn, taking those principles into the concrete situations of a congregation.
Finally, readers who are new to biblical theology may need to learn the rhythm of moving from text to theme and back again. The book is accessible, yet it still expects an attentive reader who wants to follow an argument across Scripture.
How We Would Use It
We would use this book as a sermon preparation companion when preaching texts that speak of prayer, confession, or public allegiance to the Lord. It would also serve well in training settings, especially for helping future leaders connect prayer and theology. For church wide discipleship, it could support a short course on prayer that is rooted in Scripture rather than in technique.
It is also useful for evangelism and assurance. The theme helps clarify what it means to respond to the gospel, and it offers language for inviting people to come to the Lord in faith.
Closing Recommendation
This is a clear, biblically grounded study of a theme that sits near the heart of Christian faith. It will help Bible teachers speak about prayer and faith as covenantal dependence on the saving Lord.
J. Gary Millar
J. Gary Millar is a Northern Irish Old Testament scholar and Anglican minister of the contemporary evangelical tradition, shaped by historic Reformation theology.
He has written and taught extensively on Deuteronomy, the Psalms, and biblical theology, serving in theological colleges in Ireland and Australia. His work is marked by a close reading of the text alongside a concern for its theological and pastoral implications. Millar has also contributed to accessible commentaries that aim to serve working pastors.
He is valued for clarity, warmth, and an ability to show how Old Testament theology feeds Christian faith and obedience. Millar keeps the covenantal storyline in view and writes with confidence in the unity of Scripture. Those preparing to preach will find his work both steadying and stimulating.
Theological Perspective: Reformed