New Churches Masterclass | Season 1 | Episode 51

Purity and the Unity of the Church with Gregg Allison

Gregg Allison

Gregg Allison explores two essential characteristics of the church: its purity, defined as freedom from false doctrine and conformity to God’s will, and its unity, rooted in shared faith and sustained by the Holy Spirit. Allison emphasizes that church growth and maturity depend on the combined work of Christ and believers.

Published on August 18, 2025

About the Podcast

New Churches Masterclass

The New Churches Masterclass podcast is your go-to source for practical, gospel-centered training to fuel faithful ministry. Each episode features sessions from a variety of masterclass courses—covering theology, preaching, church planting, sending churches, and more. Whether you're a pastor, planter, or ministry leader, you’ll gain the biblical foundations, practical tools, and leadership insights you need to strengthen your ministry and serve your community well. Learn from trusted practitioners as they equip you to think deeply, preach clearly, lead boldly, and multiply the mission. No matter where you are in your ministry journey, the New Churches Masterclass podcast will help you grow and endure.

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Meet the Author

Gregg Allison

Dr. Gregg Allison serves as Professor of Christian Theology. Dr. Allison came to Southern in 2003 from Western Seminary in Portland, Oregon, where he taught theology and church history for nine years. He has 18 years of ministry experience as a staff member of Campus Crusade (Cru), where he worked in campus ministry, as well as serving as a missionary in Italy and Switzerland. He also co-pastored a church in Lugano, Switzerland. He is the secretary of the Evangelical Theological Society and currently serves as the book review editor for theological, historical, and philosophical studies, Journal of the Evangelical Theological Society.

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