1 Corinthians 5:9-13 Commentary: Discerning Association and Judgment

First-century Corinth was a bustling Roman colony with a notorious reputation for sexual licence. The city housed the temple of Aphrodite, whose cult employed sacred prostitutes, and overall moral standards were low. Clarke observes that Paul’s remark “for then you would have to leave the world” paints a devastating picture: Corinth was so saturated with sin that Christians could hardly conduct daily business without encountering fornicators, swindlers, and idolaters. Paul does not call believers to flee the world. As the Cambridge Bible notes, he “would not have his converts flee from the world, as so many did in later ages, but remain in it and leaven it.” This rejection of monastic separation (later championed by some movements) was deliberate.

Jewish background sheds light on the terminology. The phrase “those who are without” (τοὺς ἔξω) was used by Jewish communities to refer to Gentiles, those outside the covenant people. Gill points out that Paul adopts this insider/outsider language to define the church’s jurisdiction: the community can only exercise discipline over those who have voluntarily joined it. The command “do not even eat with such a person” likely includes both the common meal and the Lord’s Supper, which were often shared in the early church. Eating together signified fellowship and endorsement; withholding it marked a clear boundary.

The citation “Put away the wicked man from among yourselves” echoes Deuteronomy 17:7 and 22:21, where Israel was commanded to purge evil from the camp. Paul applies this principle to the church as the new covenant community. The judicial overtones would have been familiar to Corinthian believers who had Jewish backgrounds, reinforcing the seriousness of community discipline.

The consulted sources note one significant variant: in verse 12, the word “also” (καί, translated “also” in WEB and KJV) is omitted by manuscripts A, B, C, F, G, the Syriac, Coptic, Slavonic, Vulgate, Itala, and several Church Fathers. This omission makes the question read more naturally: “For what have I to do with judging those outside?” rather than “judging also those outside.” Adopting the shorter reading (as most modern critical texts do) removes any implication that Paul is setting up a comparison between judging insiders and outsiders; the focus remains on the distinction of jurisdictions. No other textual issues in this passage significantly alter the meaning.

Church tradition has read this passage as a foundational text for church discipline. Early church orders like the Didache reflect the principle of separating from unrepentant members. John Calvin (1509, 1564) used the passage to argue that the power of excommunication belongs to the local church, not to civil magistrates. In the Wesleyan tradition, Adam Clarke stressed the practical impossibility of avoiding all sinners in the world, commending Paul’s realism. Matthew Henry (1710) noted that the loss of the earlier letter is no loss to us, since God preserved what is sufficient. More recently, the passage has been used in discussions about church membership, accountability, and the relationship between the church and secular society. Despite differences over the details, the existence of the lost letter, the exact scope of table fellowship, the passage has consistently been seen as a call to maintain the purity of the church’s witness through loving, firm discipline, while not withdrawing from the world Christ came to save.

Three-point outline

1. The misunderstood command (vv.9, 10). Paul’s earlier directive to avoid immoral people had been taken too far, his readers thought it meant total withdrawal from the world. He clarifies: he never intended that. Christians are called to live in the world, not escape it. The mission depends on contact with unbelievers.
2. The real target: professing believers in unrepentant sin (v.11). The separation Paul commands is from anyone who “is called a brother” yet lives in sexual immorality, greed, idolatry, slander, drunkenness, or extortion. The phrase “called a brother” (ὀνομαζόμενος ἀδελφός) suggests the person bears the name but does not live accordingly. Such a person undermines the church’s witness.
3. Two spheres of judgment (vv.12, 13). The church must judge its own members (those “within”); God judges those “outside.” This is not a license to neglect outsiders’ sin, but a recognition that the church’s formal discipline only applies to its own. The community is to expel the wicked person, trusting God’s ultimate justice for those outside.

Five-point outline

1. Paul corrects a misinterpretation of a previous letter (v.9).
2. He distinguishes between unbelievers and professing believers (v.10).
3. He lists specific sins that disqualify one from fellowship: sexual immorality, covetousness, idolatry, slander, drunkenness, extortion (v.11).
4. He limits the church’s judicial role to those inside the community (v.12).
5. He commands expulsion based on Old Testament precedent (v.13).

Illustration hooks

• A sports team: A coach may tell players not to associate with known drug users. But if that meant never walking past a drug dealer on the street, they’d never leave the locker room. Paul’s command is about who gets to wear the team jersey, not avoiding the neighbourhood.
• A family dinner: You eat with your own kids even when they misbehave, but if an adult family member persists in destructive behaviour and refuses help, you may stop sharing meals to protect the household. The “table” is a place of intimacy and accountability.
• A professional license: A medical board revokes a doctor’s license for misconduct. That doesn’t mean the board tries to shut down every unlicensed practitioner, only those who claimed the credential and violated its trust.

Questions your congregation is asking

• “Are we supposed to cut off friendships with non‑Christian friends who sin?”
• “What about a relative who claims to be a Christian but lives openly in sin, are we not to eat with them?”
• “How do we judge within without becoming judgmental?”

This passage addresses a tension every Christian community faces: how to be in the world without being of it. Paul’s correction shows that the problem is not contact with unbelievers, but tolerating unrepentant sin among those who claim to follow Christ. Small groups can explore this together.

Discussion questions

1. Read verses 9, 10. What misunderstanding had occurred about Paul’s previous letter? How does he clarify it?
2. In verse 11, Paul lists six types of sin. Why do you think he includes “slanderer” and “drunkard” alongside more obvious sins like sexual immorality?
3. What does it mean to “not even eat with” such a person? How would that look in your church context today?
4. In verse 12, Paul distinguishes between “those within” and “those outside.” How does this shape the church’s responsibility? Should we ever confront the sins of non‑believers?
5. Verse 13 quotes Deuteronomy. How does the Old Testament command to “put away the wicked” apply to the New Testament church? What is the goal of such expulsion?
6. What is the difference between judging a brother (accountability) and being judgmental (a condemning attitude)? How can your group practice the former without the latter?
7. How does this passage encourage you to live faithfully in a world where sin is everywhere, without becoming isolated or becoming complacent?