Dr. Guy Waters is the Professor of New Testament at the Reformed Theological Seminary, Jackson, Mississippi and a teaching elder in the Mississippi presbytery of the Presbyterian Church in America. Today, he joins us to speak about his book, One, Holy, Catholic, and Apostolic Church (Lexham Academic), in which he sets out a full-scale Reformed doctrine of the church. The title echoes the four classical “marks” confessed in the Niceno-Constantinopolitan Creed. This study is an extended exploration of how Scripture, read through a Reformed lens, fills out each of those creedal descriptors and binds them together into a single, coherent doctrine of the church.

Dr. Waters organizes the book in three movements:

The conclusion distills the argument into seven theses that function as a theological checksum. Throughout, Waters interlaces biblical exegesis, historical theology and confessional sources (especially the Westminster Standards). The result is both an academic survey and a pastoral manifesto aimed at equipping the church for faithful witness today.

The conversation explores the essential identity and mission of the church, the continuity between the Old and New Testaments, and what is distinctly new through Christ’s redemptive work. Waters outlines the seven theses of his book, offering clarity on ecclesiology for today’s church, particularly in light of confusion over polity, worship, and the church’s relation to the state.

This episode is an invitation to recover a robust, Reformed understanding of the church’s nature and calling, rooted in Scripture and developed in the tradition of historic confessions.

Watch on YouTube

Participants: Camden Bucey, Guy Prentiss Waters