Episode Summary – Westminster Shorter Catechism Q&A 6

Podcast: The Westminster Shorter Catechism with Sinclair Ferguson
Host: Ligonier Ministries
Episode: Question & Answer 6
Date: March 10, 2026

Overview

This episode focuses on Question 6 of the Westminster Shorter Catechism: "How many persons are there in the Godhead?" Dr. Sinclair Ferguson explores the foundational doctrine of the Trinity—explaining the unity and diversity within the Godhead as three distinct persons (Father, Son, Holy Ghost), who are nonetheless one God in substance, power, and glory. The discussion unpacks why understanding the Trinity is critical to Christian faith and spiritual maturity, and how both beginners and mature believers benefit from growing in this profound truth.

Key Discussion Points & Insights

The Catechism Question and Answer

• Question 6:
  • “How many persons are there in the Godhead?”
• Answer:
  • “There are three persons in the Godhead: the Father, the Son, and the Holy Ghost. And these three are one God, the same in substance, equal in power and glory.” [00:02]

The Essential Doctrine of the Trinity

• Dr. Ferguson emphasizes that the doctrine of the Trinity is not an abstract puzzle, but the very heart of God’s revelation:
  • Quote: “The Christian doctrine of God is not merely that ‘God exists,’ but that God is Father, Son, and Holy Spirit.” [00:25]
• He notes how this foundational doctrine underpins the distinctiveness of Christian worship and spiritual life.

Unity and Diversity Within the Godhead

• Sinclair clarifies that Christianity is distinctive in claiming both the oneness and threeness of God.
  • Quote: “The Father is not the Son, the Son is not the Holy Ghost, and the Holy Ghost is not the Father. And yet, there is only one God.” [01:12]
• He explains this “mystery” does not contradict logic but transcends human understanding.

Equality of the Divine Persons

• All three persons share the same essence (“substance”), and are “equal in power and glory.”
  • “There’s not a hierarchy of divinity in the Trinity: each person is equally and fully God.” [01:45]
• This equality is central for Christian assurance and worship.

Relevance for Christian Life and Discipleship

• Dr. Ferguson addresses why a clear grasp of the Trinity matters:
  • Only as we know God as He truly is, can we truly worship, love, and serve Him.
  • Understanding the Trinity shapes prayer (“We come to the Father, through the Son, in the power of the Holy Spirit.” [02:23])
• “Every Christian, whether just beginning or growing in grace, is called to savor both the milk and the meat of this doctrine.” [02:41]

Teaching the Trinity: Pastors, Teachers, Parents

• The responsibility to teach the doctrine of the Trinity belongs to every discipler, “from pastors in the pulpit, to parents around the breakfast table.” [03:05]
• Ferguson underscores the importance of digesting the foundational truths before moving to the “meatier” aspects of doctrine.

Notable Quotes & Memorable Moments

• On the mystery and necessity of the Trinity:
  • “If God were not Father, Son, and Holy Spirit, He could not be the God who saves.” [03:37]
• On why this doctrine is worshipful:
  • “A God who is only a solitary being, who has never existed in loving relationship, could not be the God of the gospel.” [04:01]
• Pastoral encouragement:
  • “Don’t be afraid of mystery. This is the solid food and pure milk God has prepared for His children.” [04:22]

Important Timestamps

• 00:02 – Q&A 6 read aloud
• 00:25 – The doctrine of God is about the Trinity
• 01:12 – The distinct persons, the unity of God
• 01:45 – Equal in power and glory
• 02:23 – The Trinity’s relevance for prayer and worship
• 03:05 – Teaching the doctrine in family and church
• 03:37 – The Trinity and the gospel
• 04:22 – Final encouragement: Embracing divine mystery

Conclusion

This episode anchors listeners in the rich, mysterious, and essential teaching of the Trinity at the heart of Christian doctrine. Dr. Ferguson makes clear—knowing and loving the Triune God is foundational for believers at every stage, and teaching this truth is a privilege and a responsibility for all Christians.