Defenders Podcast

Episode: Doctrine of Salvation (Part 9): Application of Mystical Union to Our Lives
Host: Dr. William Lane Craig
Date: January 28, 2026

Episode Overview

In this episode, Dr. William Lane Craig brings his series on the Doctrine of Salvation to an important close by analyzing the concept of "mystical union"—the believer’s intimate association with Christ. Dr. Craig explores its theological implications, particularly regarding justification, and reflects on how this union ought to shape the Christian life. The discussion synthesizes historical perspectives, especially those of 17th-century Reformed theologian Francois Turretin, and concludes with practical applications for living out this union daily.

Key Discussion Points and Insights

The Mystical Union and Justification (00:17 – 07:42)

• Summary of Turretin's View:

  • Turretin (1623–1687) considered mystical union central to justification and the atonement.
  • There is an exchange: believers’ sins are imputed to Christ, and His righteousness is imputed to them (00:23).
  • Quote — Dr. Craig (citing Turretin, 00:31):

    "The curse and punishment of sin which he received upon Himself in our stead, secures to us blessing and righteousness with God in virtue of that most strict union between us and him by which, as our sins are imputed to him, so in turn his obedience and righteousness are imputed to us."

  • Twofold Union:
    • Natural: Through the Incarnation, Christ shares our human nature.
    • Mystical: Through grace, believers commune spiritually with Christ (00:52).

• Order of Salvation (Ordo Salutis):

  • Turretin claims justification comes as a result of union with Christ, but Dr. Craig finds a circular problem:
    • Union is only possible for justified/regenerate persons, but justification is said to result from union (02:40).
    • Dr. Craig suggests the legal act of justification must precede mystical union, using a bankruptcy analogy:
      • Quote — Dr. Craig (03:33):

        "Now, analogously, our being in Christ is a kind of legal status which we receive in virtue of God's declaring us to be righteous. It is because of the legal justification by God that we are in Christ. So our mystical union with Christ is not the foundation of our justification. Rather, our justification is the foundation of our mystical union with Christ."

    • Reflects on the structure of teaching: mystical union ought to follow regeneration and justification (04:38).

Practical Application of Mystical Union (07:42 – 15:50)

• Galatians 2:20 as Summary:

  • Paul’s words illustrate the believer’s new identity in Christ.
  • Quote — Dr. Craig (reading Gal. 2:20, 08:13):

    "I have been crucified With Christ, it is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God who loved me and gave Himself for me."

  • Dr. Craig invites listeners to personalize this verse, reflecting on their own union with Christ (08:35).

• Four Practical Benefits of Mystical Union:

  1. Source of Strength in Adversity (09:08):

     • Union with Christ provides supernatural strength, drawing from Christ like branches from a vine.

     • Quote — Dr. Craig (09:25):

       "As long as we are abiding in Christ, we can be drawing upon that supernatural strength which is given to us through the indwelling Holy Spirit to get through the trials and adversities of life."

  2. Call to Holy Living (10:01):

     • Believers are called to live out the holiness they possess in Christ—redeemed, forgiven, cleansed, a new creation.
     • This entails practical separation from sin and honoring the union.

  3. Summons to Closer Fellowship (11:00):

     • Union is not based on fluctuating emotions; rather, Christians are urged to actualize what they are in Christ through prayer, study, worship, and fellowship.
     • Quote — Dr. Craig (11:36):

       "Our union with Christ isn't dependent upon that emotional experience. Nevertheless...this is a summons to work out in our experience what we really are in Christ and to draw close to him in prayer, in study of His Word, in fellowship, in worship, and so forth..."

  4. Source of Security (12:36):

     • Abiding in Christ affirms eternal security—believers are redeemed, sealed, a new creation, justified, sanctified.
     • Quote — Dr. Craig (13:12):

       "For the believer who is abiding in Christ, nothing can snatch him out of the Lord's hands."

Memorable Moments & Notable Quotes

• Circuitous Problem in Theological Order (03:07):

  • Dr. Craig critiques the logical order of union and justification:
    "So there is a vicious explanatory circle. In Turretin's view, in order to be in mystical union with Christ we must first be justified. But in order to be justified we must first be in mystical union with Christ."

• Application Invitation (08:35):

  • Dr. Craig’s pastoral encouragement:
    "I want to read that statement one more time and let you reflect on it by asking yourself, can you put your name in there in place of I and me?"

Important Timestamps

• 00:17: Theological groundwork on mystical union and justification
• 02:40: Critique of circular reasoning in mystical union’s role in salvation
• 03:33: Legal analogy for justification and union
• 08:13–08:35: Galatians 2:20 application and challenge
• 09:08: Mystical union as strength in adversity
• 10:01: Call to holy living
• 11:00: Invitation to closer fellowship
• 12:36: Eternal security in union with Christ

Tone and Language

Dr. Craig’s style is methodical, clear, and didactic—with a strong pastoral note, especially in the latter half. He interweaves careful theological analysis with practical encouragement and scriptural reflection.

Conclusion

This episode offers a dense yet approachable exploration of mystical union—detailing both its theological placement in salvation and its transformational power in the believer’s daily life. Dr. Craig both informs and motivates, ensuring listeners are equipped not just to understand, but to embody the deep union they have with Christ. Next time, the series will shift its focus to the doctrine of regeneration.