This radio interview was conducted by Chris Arnzen, host of Iron Sharpens Iron Radio, with Prof. Russell Dykstra on January 20, 2026.

Iron Sharpens Iron Radio is a Christian talk radio show hosted by Chris Arnzen. It features discussions on various topics from a Reformed Christian perspective, often involving interviews with pastors, scholars, and theologians. The program aims to challenge listeners to apply their faith to all aspects of life and encourages them to share the information with their congregations.

A Heidelberg Catechism sermon on Lord's Day 39, preached by Rev. Nathan Decker at Hope Protestant Reformed Church in Walker, Michigan.

For more sermons, please see our Sermon Audio page or come visit us on Sundays at 9:30 AM or 5:00 PM.

A Heidelberg Catechism sermon on Lord's Day 38, preached by Rev. Nathan Decker at Hope Protestant Reformed Church in Walker, Michigan.

For more sermons, please see our Sermon Audio page or come visit us on Sundays at 9:30 AM or 5:00 PM.

Part 7/7

II Corinthians 11:13

A Heidelberg Catechism sermon on Lord's Day 37, preached by Rev. Nathan Decker at Hope Protestant Reformed Church in Walker, Michigan.

For more sermons, please see our Sermon Audio page or come visit us on Sundays at 9:30 AM or 5:00 PM.

Part 6/7

II Corinthians 11:13

I. Arguments Used by the False Apostles

A Heidelberg Catechism sermon on Lord's Day 36, preached by Rev. Nathan Decker at Hope Protestant Reformed Church in Walker, Michigan.

For more sermons, please see our Sermon Audio page or come visit us on Sundays at 9:30 AM or 5:00 PM.

Part 5/7

II Corinthians 12:12

I. The Nature of the Signs

A Heidelberg Catechism sermon on Lord's Day 35, preached by Rev. Nathan Decker at Hope Protestant Reformed Church in Walker, Michigan.

For more sermons, please see our Sermon Audio page or come visit us on Sundays at 9:30 AM or 5:00 PM.

Part 4/7

II Corinthians 10:8

I. Its Extent