146 episodes
- People often ask if the Bible teaches the doctrine of the Trinity OR is it a later development. But what if it's both?
In this video, I lay out a basic case for how we can find the component parts of trinitarian doctrine in Scripture while also arguing that a fully mature trinitarian theology requires development. And that's ok!
Join Me on the Camino!: https://www.gospelsimplicity.com/pilgrimage
Pre-order my novel, The Long Road to Holy Island: https://amzn.to/4sISAC9
Get access to my book club, one-on-one office hours, show notes, and more: https://patreon.com/gospelsimplicity
Make a one-time donation: https://paypal.me/gospelsimplicity
Book a meeting: https://calendly.com/gospelsimplicity/meet-with-austin
Read my writings: https://austinsuggs.substack.com
Books Mentioned:
Putting Jesus in His Place: https://link.amazon/B00yx12Zb
Works on the Spirit: https://link.amazon/B00MDyyMe
00:00 Framework
03:22 Monotheism
04:55 The Father is God
06:48 The Son is God
17:05 The Spirit is God
22:46 Distinction of Persons
25:35 Development of Doctrine
Disclaimer: Links in the description may contain affiliate links, from which I receive a small percentage of the purchase.
Support the show Salvation by Allegiance Alone: Something Protestant and Catholics Can Agree On? | Dr. Matthew Bates
12/10/2026 | 1h 8 mins.In this episode, I'm joined by Dr. Matthew Bates to discuss his work on Justification, specifically the idea of salvation by allegiance alone and its implications for Protestant-Catholic debates.
Books Discussed:
Salvation by Allegiance Alone: https://link.amazon/B01RY8dSH
Beyond the Salvation Wars: https://link.amazon/B08Xp3Wu2
Pre-order my novel, The Long Road to Holy Island: https://amzn.to/4sISAC9
Get access to my book club, one-on-one office hours, show notes, and more: https://patreon.com/gospelsimplicity
Make a one-time donation: https://paypal.me/gospelsimplicity
Book a meeting: https://calendly.com/gospelsimplicity/meet-with-austin
Read my writings: https://austinsuggs.substack.com
About the Guest: Matthew W. Bates (PhD, Notre Dame) is Professor of New Testament at Northern Seminary with expertise on the gospel and salvation. His book Why the Gospel? (Eerdmans, 2024) won the Christianity Today award in popular theology and was Outreach magazine’s “Resource of the Year” in theology and Bible. His acclaimed academic titles include Salvation by Allegiance Alone (Baker Academic, 2017) and The Birth of the Trinity (Oxford University Press, 2015). He also co-founded and co-hosts the popular OnScript podcast.
00:00 Salvation by Allegiance
04:53 What Is Faith?
14:41 Christ as King
20:48 Embodied Allegiance
28:06 Ecumenical Implications
38:23 Where Catholics Go Wrong
49:45 Baptism and Allegiance
55:41 Where Protestants Go Wrong
01:00:47 Going Deeper
*Links in the Description may include Affiliate Links, from which I receive a small commission at no extra price for you.
Support the show- In this episode, I'm joined by Catholic apologist and repeat guest, Suan Sonna, to discuss Mary's role in the Early Church. Specifically, we're looking at some sources that I didn't bring up in my own video on the historical record for Marian doctrine and devotion in the early church. These sources include the Odes of Solomon, the Sibylline Oracles, and more. Along the way, we also talk at length about historical methodology and how history and theology intersect.
Pre-order my novel, The Long Road to Holy Island: https://amzn.to/4sISAC9
Get access to my book club, one-on-one office hours, show notes, and more: https://patreon.com/gospelsimplicity
Make a one-time donation: https://paypal.me/gospelsimplicity
Book a meeting: https://calendly.com/gospelsimplicity/meet-with-austin
Read my writings: https://austinsuggs.substack.com
00:00 The Backstory
01:54 Ascension of Isaiah
06:08 History vs. Dogma
16:30 Odes of Solomon
26:00 "Gnosticism"?
35:13 Irenaeus
45:52 Sibylline Oracles
01:05:48 Gregory Thaumaturgus?
*Links in the Description may include Affiliate Links, from which I receive a small commission at no extra price for you.
Support the show The History of the Book of Common Prayer | Rev. Dr. Matthew Olver and Rev. Dr. Nathan Jennings
28/09/2026 | 1h 6 mins.In this episode, I'm joined by the Rev. Dr. Matthew Olver and the Rev. Dr. Nathan Jennings to discuss their book, Turning Points in Prayer Book History which traces the development of the Book of Common Prayer over the centuries.
Pre-order my novel, The Long Road to Holy Island: https://amzn.to/4sISAC9
Get access to my book club, one-on-one office hours, show notes, and more: https://patreon.com/gospelsimplicity
Make a one-time donation: https://paypal.me/gospelsimplicity
Book a meeting: https://calendly.com/gospelsimplicity/meet-with-austin
Read my writings: https://austinsuggs.substack.com
Read the Book: https://link.amazon/B025gMLW8
00:00 What Would Cranmer Think?
10:14 Elizabethan Compromise
16:03 Via Media Theology
22:46 The Importance of Rubrics
32:54 Optionality in Liturgy
44:57 English vs. Scottish BCP
56:00 What's Next?
*Links in the Description may include Affiliate Links, from which I receive a small commission at no extra price for you.
Support the showDid Nominalism Undermine Protestantism? | A Dialogue with Dr. Barnabas Aspray and Dr. Matthew Thomas
25/09/2026 | 1h 14 mins.In this episode, I'm joined by two repeat guests, Dr. Matthew Thomas and Dr. Barnabas Aspray. I've had the pleasure of getting to know both of these men over the last few years, and for almost the entirety of that time, they've insisted that I read one book: The Spirit and Forms of Protestantism by Fr. Louis Bouyer.
Finally, after much delay, I've read the book, and the three of us sat down to discuss not only this book, but also two main ideas:
1. Nominalism is at the root of the negative aspects of the Reformation.
2. All the positive aspects of the Reformation can be found within the Catholic Church.
Pre-order my novel, The Long Road to Holy Island: https://amzn.to/4sISAC9
Get access to my book club, one-on-one office hours, show notes, and more: https://patreon.com/gospelsimplicity
Make a one-time donation: https://paypal.me/gospelsimplicity
Book a meeting: https://calendly.com/gospelsimplicity/meet-with-austin
Read my writings: https://austinsuggs.substack.com
Read the Book: https://link.amazon/B09FL1iyu
Guest Links:
Barney's Podcast: @FaithattheFrontiers
About Barney: https://stmarys.edu/staff/dr-barnabas-aspray/
About Matt: https://dspt.edu/matthew-thomas/
00:00 The Backstory
11:50 Bouyer's Main Idea
19:47 Reformation Nominalism?
31:25 Still Nominalist?
39:26 What is Nominalism?
46:27 Anglican Exception?
01:07:29 My Reservations
*Links in the Description may include Affiliate Links, from which I receive a small commission at no extra price for you.
Support the show
More Christianity podcasts
Trending Christianity podcasts
About Gospel Simplicity Podcast
The Gospel Simplicity Podcast is centered around the conviction that the gospel is really good news. Here you will find conversations with Christians from various traditions as we seek to unpack the beautiful simplicity and transformative power of the gospel. Gospel Simplicity is known for ecumenical dialogue that is charitable and open to learning from people with whom you might disagree. We believe that God desires for his Church to be one, united in love for God and neighbor, and on mission to spread the gospel of Jesus Christ to all people.
Podcast websiteListen to Gospel Simplicity Podcast, Timothy Keller Sermons Podcast by Gospel in Life and many other podcasts from around the world with the radio.net app

Get the free radio.net app
- Stations and podcasts to bookmark
- Stream via Wi-Fi or Bluetooth
- Supports Carplay & Android Auto
- Many other app features
Get the free radio.net app
- Stations and podcasts to bookmark
- Stream via Wi-Fi or Bluetooth
- Supports Carplay & Android Auto
- Many other app features


Gospel Simplicity Podcast
Scan code,
download the app,
start listening.
download the app,
start listening.























