One Body, One Lord: A Comprehensive Bible Study Guide

I. Introduction & Overview

This study guide explores the biblical foundations of Christian unity as presented in Pastor Scott's sermon "One Body, One Lord." The message emphasizes that unity is not an optional virtue but essential to our Christian witness and central to Jesus' heart for His church. Unity is rooted in Christ alone and manifests when believers surrender their preferences, opinions, and self-centeredness to the Lordship of Jesus.

Sermon Summary: Pastor Scott presents unity as crucial to the church's witness, highlighting Jesus' prayer in John 17 where He connects the unity of believers directly to the world believing in Him. The message examines Ephesians 4:1-6 to show that unity is based on who we serve (one Lord), not on our preferences. True unity requires humility, gentleness, patience, and forgiveness. It must be intentionally guarded and protected through speaking truth in love and focusing on what unites rather than divides.

Study Objectives:

• Understand the theological foundations of Christian unity in Scripture
• Examine how the Trinity serves as the model for Christian unity
• Identify practical ways to protect and promote unity in the church
• Recognize personal barriers to unity in your own life
• Develop a biblical perspective on handling disagreements while maintaining unity

Estimated Study Time: 2-3 hours

II. Exegetical Analysis

Structure and Genre

The sermon centers on two key passages: John 17:20-23 and Ephesians 4:1-6. Both texts are didactic (teaching) in nature, with John 17 being part of Jesus' high priestly prayer and Ephesians 4 being part of Paul's ethical instructions to the church.

The sermon follows a logical progression:

1. Introduction to unity as essential to Christian witness (John 17)
2. Biblical foundations of unity (Ephesians 4:1-6)
3. Character qualities that protect unity (humility, gentleness, patience)
4. Practical applications for living in unity

Verse-by-Verse Analysis

John 17:20-23

This passage occurs within Jesus' final prayer before His arrest and crucifixion, highlighting its significance. Jesus prays not only for His immediate disciples but for all future believers.

• Verse 20: Jesus extends His prayer beyond the immediate disciples to all future believers who would come to faith through their message, establishing continuity in the faith community across time.
• Verse 21: The goal is that "they all may be one" with a specific model: "as You, Father, are in Me, and I in You." The unity of believers is to mirror the unity within the Trinity—a profound, intimate, and perfect unity of purpose and love. The purpose of this unity is evangelistic: "that the world may believe that You sent Me."
• Verse 22: Jesus has given believers His glory to enable this unity. This "glory" likely refers to the revelation of God's character and presence manifested in Jesus and now shared with believers.
• Verse 23: Jesus emphasizes the mutual indwelling—"I in them and You in Me"—that produces "perfect unity" (NIV). Again, the purpose is missional: "that the world may know" both Jesus' divine sending and God's love for believers.

Ephesians 4:1-6

• Verse 1: Paul begins with "therefore," connecting what follows with the doctrinal foundation laid in chapters 1-3. The "calling" refers to God's invitation to salvation and life in Christ.
• Verse 2: Paul lists virtues necessary for unity: humility, gentleness, patience, and bearing with one another in love. These qualities counter self-centeredness that destroys unity.
• Verse 3: "Endeavoring" (σπουδάζοντες/spoudazontes) indicates diligent effort—unity requires active maintenance. The "unity of the Spirit" suggests this unity is created by the Holy Spirit but must be preserved by believers through the "bond of peace."
• Verses 4-6: Seven repetitions of "one" emphasize the unified nature of the faith. The sequence progresses from the church (one body) through the Spirit, hope, Lord, faith, baptism, to God the Father, creating a comprehensive picture of Christian unity.

Author's Intent

In John 17, Jesus intends to establish unity as essential to the church's witness and as a reflection of the unity within the Godhead. His prayer reveals that unity is not merely functional but deeply theological.

In Ephesians 4, Paul's intent is to move from theology to practical ethics, showing how the doctrinal truths of chapters 1-3 should shape community life. He emphasizes that unity is both a gift from God and a responsibility of believers to maintain.

III. Historical & Cultural Context

Setting of John 17

Jesus' prayer in John 17 takes place during the Last Supper, the night before His crucifixion. This timing is significant—Jesus is about to face the ultimate sacrifice, yet His concern is for the unity of His followers after He is gone. In the first-century Jewish context, a person's final words were considered especially important and binding.

The early Christian community was facing increasing hostility from both Jewish authorities and the Roman Empire. Unity would be crucial for their survival and witness in this hostile environment.

Setting of Ephesians 4

Paul wrote Ephesians likely during his Roman imprisonment (around 60-62 AD). The church at Ephesus was a mixed community of Jewish and Gentile believers, bringing together people from vastly different religious, cultural, and social backgrounds. These differences created natural fault lines that could threaten unity.

In the Greco-Roman world, social divisions were rigid and considered natural. Jews typically avoided close association with Gentiles. Paul's vision of unity across these boundaries was radical and counter-cultural.

Cultural Understanding of Unity

In the first century, unity was typically based on shared ethnicity, social status, or philosophical allegiance. The Christian concept of unity based on shared faith in Christ regardless of background was revolutionary.

The early church faced pressure to divide along cultural lines (Jewish vs. Gentile practices) as seen in Acts 15 and Galatians. Paul consistently taught that in Christ, these divisions were overcome (Galatians 3:28), though living this out remained challenging for early believers.

IV. Word Studies

"One" (εἷς, heis): This Greek word appears seven times in Ephesians 4:4-6, emphasizing the singularity and uniqueness of each element mentioned. In biblical numerology, seven represents completeness or perfection, suggesting that this sevenfold unity represents the complete foundation of Christian unity. The repetition creates a rhythmic emphasis that would have been striking to the original hearers.

"Endeavoring" (σπουδάζοντες, spoudazontes): This term in Ephesians 4:3 comes from the root σπουδάζω (spoudazō), meaning "to make haste, to exert oneself, to be zealous or eager." It conveys the sense of earnest effort and diligence. The present participle form indicates ongoing action—continually making every effort. This word choice reveals that unity doesn't happen automatically but requires intentional, sustained effort.

"Unity" (ἑνότης, henotēs): This rare Greek word appears only twice in the New Testament, both times in Ephesians (4:3, 13). It refers to oneness or unanimity. Its rarity suggests it may have been chosen specifically to emphasize the unique nature of Christian unity. It's not merely agreement but a profound oneness created by the Spirit.

"Bond" (σύνδεσμος, syndesmos): In Ephesians 4:3, this word literally refers to that which binds together, like a ligament in the body. It comes from σύν (together) and δέω (to bind). Paul uses the same word in Colossians 3:14 to describe love as the "perfect bond of unity." The metaphor suggests that peace actively holds the community together, preventing fragmentation.

"Bearing with" (ἀνεχόμενοι, anechomenoi): This term in Ephesians 4:2 means "to hold up, to endure, to put up with." It acknowledges that living in community involves difficulties and irritations that must be patiently endured. The word implies sustained tolerance of others' weaknesses and differences, not just momentary patience.

V. Cross-References & Biblical Theology

1 Corinthians 12:12-27 - Paul uses the body metaphor to explain how diversity and unity coexist in the church. This passage complements Ephesians 4 by showing that unity doesn't mean uniformity—different members have different functions but form one body.

Philippians 2:1-11 - Paul urges believers to be "of one mind," having the same love and being in full accord. The pattern for this unity is Christ's humility and self-sacrifice. This passage adds depth to our understanding of how humility serves unity.

Colossians 3:12-15 - Similar to Ephesians 4, this passage lists virtues necessary for unity: compassion, kindness, humility, meekness, patience, forgiveness, and love which is "the perfect bond of unity." It adds "let the peace of Christ rule in your hearts," connecting to the "bond of peace" in Ephesians.

Romans 14:1-15:7 - Paul provides practical guidance on maintaining unity despite differences of opinion on non-essential matters. This passage helps us understand how to live out unity while respecting diversity of conscience.

Acts 4:32-35 - This description of the early church shows unity in action: "The full number of those who believed were of one heart and soul." Their unity extended to practical sharing of possessions, demonstrating that biblical unity has tangible expressions.

John 13:34-35 - Jesus says, "By this all people will know that you are my disciples, if you have love for one another." This connects with John 17's emphasis on unity as witness, showing that love and unity are intertwined.

Psalm 133:1-3 - "Behold, how good and pleasant it is when brothers dwell in unity!" This psalm celebrates unity among God's people as blessed by God, showing that unity has been valued in God's community throughout biblical history.

Galatians 3:26-28 - "There is neither Jew nor Greek...for you are all one in Christ Jesus." This passage establishes the theological foundation for unity across cultural, social, and gender differences.

Matthew 5:23-24 - Jesus teaches that reconciliation takes priority even over worship: "First be reconciled to your brother, and then come and offer your gift." This supports the sermon's point about addressing issues rather than letting them fester.

1 Peter 3:8-9 - "Finally, all of you, have unity of mind, sympathy, brotherly love..." This shows that the call to unity was consistent across apostolic teaching, not just Paul's emphasis.

2 Corinthians 13:11 - "Aim for restoration, comfort one another, agree with one another, live in peace." This provides another apostolic exhortation to unity and peace that reinforces the sermon's message.

Proverbs 6:16-19 - Among the things the Lord hates is "one who sows discord among brothers," supporting the sermon's warning about the seriousness of disunity.

VI. Interpretive Considerations

Different Views on the Nature of Unity

1. Institutional Unity: Some traditions emphasize organizational or institutional unity, suggesting that true Christian unity requires structural unification of churches. This view often points to Jesus' prayer that "they may be one" as requiring visible, organizational unity.

2. Spiritual Unity Only: Others argue that unity is purely spiritual—believers are united in Christ regardless of denominational or doctrinal differences. This view emphasizes the "invisible church" concept.

3. Unity in Essentials: A middle position holds that unity requires agreement on essential doctrines while allowing diversity on secondary matters. This is captured in the saying: "In essentials, unity; in non-essentials, liberty; in all things, charity."

The sermon aligns most closely with the third view, emphasizing that unity is based on our shared commitment to Christ as Lord while acknowledging that differences will exist. The sermon clarifies that "unity is not uniformity"—we aren't called to be identical in all our expressions of faith.

Challenges in Interpretation

A key interpretive challenge is determining what constitutes an essential matter worth dividing over versus a preference we should surrender for unity's sake. The sermon doesn't provide a comprehensive answer but suggests that anything competing with Christ for centrality is problematic.

Another challenge is balancing the call to unity with the call to truth. Paul urges "speaking truth in love" (Ephesians 4:15), suggesting that unity doesn't mean ignoring issues. The sermon addresses this by noting that unity "does not mean that we never address issues or have difficult conversations."

Why the Sermon's Interpretation Works

The sermon's interpretation is compelling because:

1. It honors both the theological foundation (unity reflecting Trinitarian relationship) and practical application (character qualities that maintain unity).

2. It recognizes that unity is both a gift from God ("unity of the Spirit") and a responsibility of believers ("endeavoring to keep").

3. It acknowledges the tension between unity and truth-telling, avoiding both false unity (ignoring issues) and unnecessary division (elevating preferences).

4. It connects unity directly to witness, aligning with Jesus' stated purpose in John 17 that "the world may believe."

VII. Theological Implications

Trinitarian Theology

The sermon highlights that our unity is modeled after the unity of the Trinity. This has profound theological implications. The persons of the Trinity maintain perfect unity while remaining distinct—there is both oneness and diversity. Similarly, Christian unity doesn't erase our differences but transcends them. The Trinity provides both the pattern and power for our unity.

Ecclesiology (Doctrine of the Church)

The message reinforces that the church is not merely a human organization but a divine creation—"one body" empowered by "one Spirit." Unity is not optional but essential to the church's nature and mission. This challenges individualistic views of Christianity that minimize the importance of community.

The repeated use of "one" in Ephesians 4:4-6 establishes that the church's unity is grounded in theological realities: one Spirit, one hope, one Lord, one faith, one baptism, one God and Father. Unity is therefore not primarily about human agreement but about shared participation in these divine realities.

Soteriology (Doctrine of Salvation)

The sermon implies that salvation brings us into a community, not just an individual relationship with God. When we become Christians, we are united not only to Christ but to all others who are in Christ. This challenges individualistic understandings of salvation that focus solely on personal benefits.

Pneumatology (Doctrine of the Holy Spirit)

Ephesians 4:3 speaks of the "unity of the Spirit," suggesting that unity is created by the Holy Spirit. This implies that true Christian unity is supernatural, not merely the result of human effort or agreement. The Spirit creates unity; believers are called to maintain it.

Christology (Doctrine of Christ)

The sermon emphasizes that Jesus is "one Lord" who must be central. When anything displaces Christ from the center, unity becomes impossible. This highlights the lordship of Christ as essential to Christian unity—we are united by our common submission to His authority.

Eschatology (Doctrine of Last Things)

The pastor mentions that "God's trying to raise up a church because it's the end times" and "He's not coming back until I have my church." This connects unity to God's eschatological purposes—the church's unity is part of its preparation for Christ's return.

VIII. Practical Application

Personal Heart Examination

The sermon asks a penetrating question: "What competes with Christ for the center of your life?" This invites personal reflection:

• Examine your reactions when your preferences aren't accommodated. Do you feel disproportionately upset?
• Consider whether political identity, cultural background, or personal taste has become more defining for you than your identity in Christ.
• Ask yourself whether you're more committed to being right than to preserving relationships.

Developing Unity-Building Habits

1. Practice humility daily: Look for opportunities to put others' needs before your own preferences. When decisions are being made in church contexts, ask yourself, "Am I pushing for this because it's truly best for the body, or because it's what I prefer?"

2. Cultivate forgiveness: Identify any lingering resentments and address them promptly. As the sermon notes, "Unity cannot exist where unforgiveness festers." Consider using a prayer practice where you regularly release offenses to God.

3. Speak truth in love: When issues arise, address them directly with the person involved rather than complaining to others. Practice framing difficult conversations with affirmation and genuine care.

4. Focus on essentials: When disagreements arise, ask, "Is this about Jesus and the gospel, or about secondary matters?" Train yourself to distinguish between preferences and principles.

Building Unity in Church Relationships

1. Intentionally connect across differences: Seek out relationships with believers who are different from you in age, background, or perspective. Unity grows through relationships that cross natural dividing lines.

2. Participate in corporate prayer: Join with others in praying specifically for unity in your church family. Prayer aligns our hearts with God's desire for unity.

3. Practice active listening: When others express views different from yours, listen to understand rather than to respond. Ask questions that help you see from their perspective.

4. Serve together: Working alongside others toward common goals builds relationships and unity. Find ways to serve with people you don't know well.

5. Guard your speech: Commit to not speaking negatively about other believers, especially church leaders. As Proverbs warns, God hates "one who sows discord among brothers."

Addressing Conflict While Maintaining Unity

1. Distinguish between preferences and principles: Be willing to yield on matters of preference while standing firm on clear biblical teaching.

2. Approach conflict with the goal of restoration: Enter difficult conversations seeking understanding and reconciliation, not victory.

3. Give grace for growth: Remember that all believers are in process. Allow others space to grow and change, just as you need that space.

4. Practice 1 Corinthians 13 love: As the sermon mentions, "Love does not keep score." Consciously choose to let go of past hurts rather than accumulating grievances.

IX. Discussion Questions

1. Observational: What specific qualities does Paul list in Ephesians 4:2 as necessary for maintaining unity? How do these qualities counteract the natural tendencies that lead to division?

2. Interpretive: Jesus prays that believers would be one "as we are one" (John 17:22). What aspects of the Trinity's unity should be reflected in the church's unity? How is this different from mere organizational unity?

3. Theological: How does the concept of "one Lord" (Ephesians 4:5) relate to the issue of unity? What happens when something other than Jesus takes the central place in our lives or churches?

4. Applicational: The sermon asks, "What competes with Christ for the center of your life?" How would you answer this question? What practical steps could you take to ensure Christ remains central?

5. Investigative: Research the early church's struggles with unity in Acts and the Epistles. What issues threatened to divide them, and how were these issues addressed by the apostles?

6. Theological: How does the "unity of the Spirit" (Ephesians 4:3) differ from unity created by human effort or agreement? What role does the Holy Spirit play in creating and maintaining unity?

7. Interpretive: Paul says we should be "endeavoring to keep the unity of the Spirit" (Ephesians 4:3). What does the word "endeavoring" suggest about the nature of maintaining unity? Is unity automatic or does it require effort?

8. Applicational: The sermon states that "unity is based on who we serve and not what we prefer." Identify a situation where you've had to set aside your preferences for the sake of unity. What made this challenging, and what helped you do it?

9. Theological: How does our understanding of the church as "one body" (Ephesians 4:4) shape how we should view and treat fellow believers, even those with whom we disagree?

10. Interpretive: The sermon distinguishes between unity and uniformity. Based on 1 Corinthians 12 and Ephesians 4, how can the church maintain unity while embracing diversity of gifts, perspectives, and expressions of faith?

11. Applicational: The sermon mentions that "speaking truth in love" is essential for unity. Describe a situation where you need to have a difficult conversation with someone. How could you approach this conversation in a way that builds rather than threatens unity?

12. Theological: How does the concept of Christian unity challenge individualistic approaches to faith that are common in Western culture? What cultural barriers make biblical unity difficult to achieve?

X. Recommended Resources

Commentaries

1. "Ephesians" by Clinton E. Arnold (Zondervan Exegetical Commentary) - A thorough, accessible commentary that provides detailed analysis of the Greek text while remaining readable for those without Greek knowledge. Particularly strong on the cultural background of Ephesus. (Moderate)

2. "The Letter to the Ephesians" by Peter T. O'Brien (Pillar New Testament Commentary) - Scholarly yet pastoral, with excellent treatment of the theme of unity in Ephesians. (Advanced)

3. "John: The Gospel of Belief" by Merrill C. Tenney - A classic evangelical commentary that provides insightful analysis of John 17 and Jesus' high priestly prayer. (Introductory to Moderate)

Books on Christian Unity

4. "Life Together" by Dietrich Bonhoeffer - A profound meditation on Christian community by a theologian who lived and died for his convictions. Explores practical aspects of life in Christian community. (Moderate)

5. "Disunity in Christ: Uncovering the Hidden Forces that Keep Us Apart" by Christena Cleveland - Combines social psychology with theology to examine why Christians divide and how we can overcome these tendencies. (Introductory to Moderate)

6. "The Compelling Community: Where God's Power Makes a Church Attractive" by Mark Dever and Jamie Dunlop - Explores how gospel-centered unity creates a compelling witness to the world. (Introductory)

Online Resources

7. BibleProject Video: "One" (https://bibleproject.com/explore/video/one-unified-biblical-theology/) - A visually engaging exploration of the biblical theme of unity from Genesis to Revelation. (Introductory)

8. Desiring God: "The Gospel and Racial Harmony" (https://www.desiringgod.org/topics/ethnic-harmony) - A collection of articles and sermons addressing unity across ethnic and cultural differences. (Introductory to Advanced)

Additional Resources

9. "Biblical Foundations for Manhood and Womanhood" edited by Wayne Grudem - For those interested in exploring unity amidst gender differences in the church. Presents a complementarian perspective. (Advanced)

10. "From Conflict to Communion: Lutheran-Catholic Common Commemoration of the Reformation in 2017" - A document exploring how churches with historical divisions can move toward greater unity while acknowledging real differences. Useful for understanding ecumenical approaches to unity. (Advanced)