Ephesians 4:5 Commentary: One Lord, One Faith, One Baptism

Ephesians 4:5 sits within a letter written by Paul while in custody (Ephesians 4:1). The church in Ephesus was a mixed community of Jewish and Gentile believers, a group prone to divisions. In chapters 1, 3 Paul lays out the grand theological vision of a unified humanity in Christ; in chapter 4 he turns to practical exhortation. The sevenfold repetition of 'one' in 4:4, 6 is emphatic and echoes a pattern found in early Christian confessions, possibly drawn from a baptismal liturgy. The three items of verse 5, Lord, faith, baptism, correspond to the three Persons of the Trinity: the Spirit in verse 4, the Father in verse 6. This triadic structure has led many to see the influence of the baptismal formula of Matthew 28:19.

In the Greco-Roman world, unity was often enforced by conformity to a single ruler or cult. Paul offers a different kind of unity, rooted not in coercion but in shared realities. 'Lord' was a bold title for Jesus in a culture that reserved it for Caesar. The faith spoken of is not a mere intellectual agreement but a trust that joins believers to the Lord. Baptism was the initiatory rite that marked entry into the community, the one public act that all Christians underwent regardless of background. The context of Ephesians 2:11, 22, where Paul describes the breaking down of the dividing wall between Jew and Gentile, underscores that these three elements are the common ground of all believers.

The text of Ephesians 4:5 is secure, with no significant variant readings noted in the consulted sources. The unanimous testimony of the manuscripts supports 'one Lord, one faith, one baptism.'

Ephesians 4:5 has been central to ecclesiological reflection since the early church. The threefold pattern appears in baptismal liturgies and creeds; the Nicene-Constantinopolitan Creed confesses 'one baptism for the remission of sins,' echoing Paul's language. In the Reformation, both Catholics and Protestants appealed to the verse: Catholics saw 'one faith' as the deposit of doctrine preserved by apostolic succession; Protestants emphasized 'one Lord' and 'one faith' as personal trust in Christ alone, not human institutions. The verse has been quoted in ecumenical documents to affirm the unity of all who call on the name of Jesus and are baptized in His name. Modern readings often stress that the verse offers a basis for unity without requiring uniformity in worship or government.

Three-point outline

1. One Lord: Christ alone rules over His church. Barnes notes that this implies a shared master, not different lords for different groups. When believers remember that they answer to the same Lord, petty divisions lose their sting.
2. One Faith: Both the act of trusting and the content of belief. Cambridge and Vincent stress that it is personal trust that unites us to the one Lord; Clarke and Gill add that this trust rests on a shared body of truth. Neither excludes the other. The faith that saves and the faith that is believed are both one.
3. One Baptism: The single rite of initiation into the body of Christ. Calvin calls baptism the bond that makes us one body and one soul. It is administered to individuals but unites them to the whole church. Jamieson-Fausset-Brown notes that baptism is the sacrament of incorporation, while the Lord’s Supper is the ongoing communion of those already united.

Five-point outline

1. The basis of unity is not human agreement but divine gifts: a Lord, a faith, a baptism.
2. The one Lord owns every believer equally, breaking down social and ethnic barriers.
3. The one faith is both the trust in the heart and the truth handed down.
4. The one baptism is the initiatory seal, the public declaration of belonging to Christ.
5. These three form a chain that binds Christians together before any differences emerge.

Illustration hooks

• A single master key that opens every door in a building. The rooms differ, but the same key fits each lock.
• Two strangers from different countries meet abroad and discover they share the same passport and the same language. They belong to the same homeland, even if their local customs differ.
• A wedding ring does not create the marriage but seals it publicly. In the same way, baptism does not create salvation but seals the faith that unites to the one Lord.

Questions your congregation is asking

• If we have one Lord, why are there so many denominations? Does this verse mean we should merge all churches?
• Does 'one faith' mean I must agree with every Christian on every doctrine to be truly united to them?
• If baptism is one, how do we handle different modes and ages of baptism between traditions?

Paul urges believers to maintain the unity of the Spirit (Ephesians 4:3). In verses 4, 6 he gives seven reasons why unity is not optional but grounded in reality. Verse 5 touches on three realities that all Christians share, regardless of background. This small group guide will help you think through what these realities mean for how we relate to Christians from other churches and traditions.

Discussion questions

1. Observation: What does Paul list in verse 5? How do these three items relate to each other?
2. Observation: Read Ephesians 4:1, 6 together. What is Paul urging believers to do? What reasons does he give?
3. Interpretation: Why does Paul mention baptism but not the Lord's Supper here? Vincent says baptism precedes and is essential to unity, while the Lord's Supper assumes it. Do you agree?
4. Interpretation: Some commentators say 'faith' here means personal trust in Christ; others include the body of Christian doctrine. How does each view affect the way we pursue unity?
5. Application: How does the truth that we have 'one Lord' change the way we speak about Christians in other denominations?
6. Application: Think of a disagreement you have had with another believer. How could remembering 'one Lord, one faith, one baptism' shape your response?
7. Application: This verse is about what we share, not what divides us. What is one step your group could take to express unity with another local church?