Podcast Summary: What's New in the New Covenant?

Podcast: Things Unseen with Sinclair B. Ferguson
Host: Ligonier Ministries
Episode: What’s New in the New Covenant?
Date: October 24, 2025

Overview: Main Theme and Purpose

This episode concludes a week-long thematic reflection on the concept of God’s covenant, with a special focus on the “new covenant” as promised in Scripture. Sinclair B. Ferguson explores what makes the new covenant distinct and “new” compared to earlier covenants, highlighting its fulfillment in Christ and its profound impact on the believer’s relationship with God. The devotional, while deeply theological, aims to make spiritual truths accessible and personally meaningful to listeners seeking renewal.

Key Discussion Points & Insights

1. Unfolding of God’s Covenant of Grace

• Covenant Continuity: The covenant of grace begins in Genesis 3:15, weaving through all the biblical covenants until it is fulfilled in Christ.
• Unity in Diversity: Each covenant has its unique characteristics but is part of a larger, single promise from God.
• Grace as Foundation: God’s grace calls for a response of “unreserved, total, joyful obedience” (01:05) from His people.

2. Purpose of God’s Covenant

• God uses covenants to bind people to Himself so they might become more like Him and reflect His character, ultimately being “conformed to the image of His Son.” (02:00)

3. What Makes the New Covenant “New”?

• Not a New Way of Salvation: The new covenant does not introduce a different path but fulfills all previous promises (02:27).
• Superseding Former Covenants: Its arrival renders previous covenants “old,” as it brings their promises to fulfillment (02:38).

4. Key Features of the New Covenant (Jeremiah 31:31–34)

Sinclair highlights two transformative features of the new covenant as prophesied by Jeremiah and referenced by Jesus:

a. The Law’s New Location: Written on the Heart

• Old Covenant: The law was external, placed inside the ark of the covenant.
• New Covenant: The law is written “within the hearts of God’s people” (03:10).
  • Not a change in the law’s content (e.g., Ten Commandments), but a transformation through the Spirit’s ministry.
  • The Spirit restores the original instinct and desire to live in fellowship with God, as was given to Adam (03:56).
• Romans 8 Parallel: Paul confirms the Spirit’s work achieves what written law could not because of human sinfulness (04:30).
  • Quote: “The righteous requirements of the law begin to be fulfilled in us as we walk according to the Spirit.” (04:39)

b. Universal Knowledge of the Lord

• Old Covenant: Knowledge of God was often mediated through prophets, priests, or kings—living “pictures of the Lord Jesus Christ.” (05:16)
• New Covenant: “We’ll all know the Lord.” (05:28)
  • No longer reliant on human mediators; every believer has direct, Spirit-led access to God through Christ.
  • Referencing John’s letter: All believers have received “the anointing and… don’t need someone to teach us” (06:10), meaning no need for intermediaries such as priests or kings.

5. The Fulfillment in Christ

• Jesus is the ultimate Prophet, Priest, and King—the reality to which all former mediators pointed.
• The reason “covenant” as a term is used less in the New Testament is because “the Lord Jesus himself is the covenant.” (07:21)

6. Surpassing Wonder of the New Covenant

• The old covenant pointed forward to Christ; now, in Him, believers have “eternal life… knowing the Father through the Son by the ministry of the Spirit.” (07:47)
• Encouragement for Listeners: “Let’s rejoice in that. Let’s revel in it this weekend, and let’s thank God together for the covenant of grace.” (08:07)

Notable Quotes & Memorable Moments

• On the Foundation of Grace:
  “In all of these different covenants, grace is the foundation for our response of unreserved, total, joyful obedience to the Lord.”
  — Sinclair B. Ferguson (01:05)

• On the Law Written on the Heart:
  “Through the Spirit's ministry, what was written originally into Adam's heart… will be rewritten into the hearts of believers. The law itself… couldn't do that.”
  — Sinclair B. Ferguson (03:56)

• On Knowing the Lord in the New Covenant:
  “We no longer need mediators, because we have one mediator between God and man, the man Christ Jesus.”
  — Sinclair B. Ferguson (06:53)

• On Christ as the Fulfillment:
  “The Lord Jesus himself is the covenant.”
  — Sinclair B. Ferguson (07:21)

• Final Encouragement:
  “Let’s rejoice in that. Let’s revel in it this weekend, and let’s thank God together for the covenant of grace.”
  — Sinclair B. Ferguson (08:07)

Timestamps for Key Segments

• 00:08–01:25: Overview of the week’s theme and introduction to the episode’s focus.
• 01:25–02:45: The unity and diversity of God’s covenants; grace as the basis for obedience.
• 02:45–03:40: What makes the new covenant new; reference to Jeremiah 31:31–34.
• 03:40–04:55: The law written on the heart; Spirit’s work in internalizing God’s law.
• 04:55–06:25: Direct knowledge of God in the new covenant; role of Jesus as final mediator.
• 06:25–07:47: Christ as the covenant; theological implications for New Testament believers.
• 07:47–End (ca. 08:15): Exhortation to rejoice in the covenant of grace.

Conclusion

Sinclair B. Ferguson’s reflection skillfully unpacks the depth and distinctiveness of the new covenant for Christians, emphasizing its fulfillment in Christ, internal transformation by the Spirit, and personal, unmediated knowledge of God. The episode closes by encouraging listeners to respond with joy and gratitude for the surpassing wonder of God’s covenant of grace.