Verses 1-2: Pollution in the House

¹ It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles, that one has his father’s wife. ² You are arrogant, and didn’t mourn instead, that he who had done this deed might be removed from among you.

• The father’s bed is a covenant boundary:

  Paul does not describe the sin in vague terms. The phrase “his father’s wife” deliberately echoes the Torah’s way of speaking about forbidden unions, where to take the father’s wife is to violate the sanctity of the father’s house and bed. This is more than private lust; it is an assault on household order, marital holiness, and the created boundaries God placed around family life. The sin is presented as a profanation of something set apart.

• Porneia names a revolt against covenant holiness:

  The term translated “sexual immorality” is broad and searching. It gathers unlawful sexual relations under one word and shows that such sins are not merely failures of impulse, but violations of God’s ordering of the body, marriage, and fidelity. Here that broad term is sharpened by a particular outrage, so that the church sees both the category and the concrete offense together.

• Creation truth still witnesses in the world:

  When Paul says this immorality is “not even named among the Gentiles,” he shows that God’s moral order is not narrow or tribal. Even among those outside the covenant people, enough of the Creator’s design remains evident for this act to be recognized as shameful. Corinth had become proud of a liberty that was less holy than the moral instincts of the surrounding world. The church must never call mature what God calls defiling.

• Mourning is the church’s first liturgy of repentance:

  The word behind “mourn” carries the language of grief, as at a death. Paul teaches that open rebellion in the body should be felt as a deathly wound in the fellowship, not managed with smug detachment. Spiritual health is seen in holy sorrow. A congregation that grieves sin is a congregation prepared to put it away.

• Boasting can mask complicity:

  Paul exposes the congregation’s arrogance before he develops the discipline of the offender. This reveals a searching principle: a church may condemn scandalous sin in speech while quietly nourishing it through pride, factionalism, or a false view of freedom. Open evil often survives because hidden self-exaltation protects it. Before discipline reaches the scandalous person, the word of God searches the atmosphere that allowed the scandal to remain.

• Removal is covenant surgery:

  “Removed from among you” introduces the chapter’s central act as the cutting away of corruption from the body. This is not social embarrassment and not personal revenge. It is spiritual surgery for the health of the church and, in God’s mercy, for the awakening of the offender. Paul teaches believers to see holiness not as decoration, but as something vital to the life of the household of God.

Verses 3-5: The Court of Christ and Severe Mercy

³ For I most certainly, as being absent in body but present in spirit, have already, as though I were present, judged him who has done this thing. ⁴ In the name of our Lord Jesus Christ, when you are gathered together with my spirit with the power of our Lord Jesus Christ, ⁵ you are to deliver such a one to Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.

• The assembled church stands before a higher throne:

  Paul speaks as though the congregation, when gathered “in the name of our Lord Jesus Christ,” becomes an earthly session of Christ’s heavenly rule. Discipline is not an improvised human reaction. The risen Lord presides over His people, and the church acts under His authority. This gives solemnity to the gathering: the assembly is not a club meeting, but a covenant body standing before its King.

• True spiritual presence serves order, not spectacle:

  Paul’s being “absent in body but present in spirit” does not describe vague religious emotion. It expresses real apostolic solidarity and governing concern that transcends distance. In a church impressed by displays of spirituality, Paul shows that genuine spiritual authority strengthens holiness, discernment, and obedience. The unseen realm is not a place of escape from moral responsibility; it presses holiness upon the visible church.

• Outside the church lies the adversary’s territory:

  To “deliver such a one to Satan” means to place the unrepentant man outside the protected sphere of the church’s fellowship and oversight into the exposed realm of the world. Scripture presents the church as a guarded people under Christ’s lordship in the midst of a hostile age. Formal removal from fellowship is therefore a real transfer of sphere: from sheltered communion to painful exposure. The severity of the act reveals how precious the church’s covering truly is.

• “Deliver” is a solemn judicial handing-over:

  The verb translated “deliver” (paradidōmi) carries the weight of formal transfer, not a burst of emotion. Paul describes a grave covenant act by which the church hands the unrepentant man over to the realm outside its fellowship. This also recalls the pattern seen in Job, where the adversary could only act within the limits God permitted. Even here, Satan is neither sovereign nor free. The Lord remains ruler over the whole process, and what the enemy means for destruction is bounded and overruled toward a redemptive end.

• Severe mercy aims at final rescue:

  “The destruction of the flesh” reaches the rebellious life where sinful self-rule operates. Whether through crushing consequences, bodily affliction, or the breaking of hardened carnality, the goal is not annihilation but rescue. Paul holds judgment and mercy together: the painful cutting down of the flesh serves the hopeful end “that the spirit may be saved in the day of the Lord Jesus.” Discipline is therefore medicinal before it is terminal.

• Present discipline is a warning sign of the last day:

  Paul joins the church’s action in the present to salvation “in the day of the Lord Jesus.” The removal of the wicked man is therefore not merely administrative; it is an earthly sign pointing ahead to the final separation between holiness and evil. In mercy, the church acts now so that the sinner may awaken before that great day arrives in its fullness.

• Discipline is completed by restoration when repentance appears:

  The severity of removal is not the whole work of love. The same apostolic wisdom that commands firmness also requires forgiveness, comfort, and renewed love when genuine repentance appears. Christ’s authority both excludes the stubbornly defiant and receives the humbled. In this way the church resists two opposite evils at once: permissiveness that leaves sin untouched, and hardness that refuses to restore the one whom grace has brought low.

• The Day of the LORD bears Jesus’ name:

  Paul’s language is striking. The Old Testament speaks of the Day of the LORD as the day of divine visitation, judgment, and vindication. Here Paul calls it “the day of the Lord Jesus.” In that phrase, Jesus stands within the divine prerogatives of final judgment and salvation. Church discipline is therefore carried out in the light of Christ’s full lordship over the last day.

Verses 6-8: Passover Purge and the Feast of Truth

⁶ Your boasting is not good. Don’t you know that a little yeast leavens the whole lump? ⁷ Purge out the old yeast, that you may be a new lump, even as you are unleavened. For indeed Christ, our Passover, has been sacrificed in our place. ⁸ Therefore let’s keep the feast, not with old yeast, neither with the yeast of malice and wickedness, but with the unleavened bread of sincerity and truth.

• Leaven pictures the quiet spread of tolerated evil:

  Yeast works invisibly, but it works thoroughly. Paul chooses this image because scandal that is excused does not remain isolated; it permeates imagination, standards, courage, and witness. What begins in one member can reshape the moral texture of the whole congregation. The warning is not against weakness confessed and fought, but against corruption welcomed and normalized.

• The church is one kneaded lump, not a pile of private lives:

  Paul’s language is corporate. The believers together are “the whole lump” and are called “a new lump.” Holiness, then, is not merely personal housekeeping; it is the shared condition of a people bound together in Christ. One person’s defiance wounds the common loaf. The chapter teaches believers to think covenantally: the church’s purity, peace, and testimony rise or fall together.

• The old leaven includes the evil being tolerated in the midst:

  Paul’s image does not leave sin floating in the abstract. The tolerated offense, and the offender clinging to it without repentance, function as “old yeast” within the house. As Israel searched out leaven after the Passover lamb was slain, so the church must remove what openly contradicts the redemption Christ has accomplished. The metaphor and the discipline therefore interpret each other.

• Passover has been fulfilled in Christ:

  When Paul says, “Christ, our Passover, has been sacrificed in our place,” he places Corinth’s crisis inside the Exodus pattern. Israel removed leaven because the lamb had been slain and deliverance had begun. In the same way, the church purges sin because redemption is not a theory but an accomplished act anchored in the sacrifice of Jesus. The cross is not only forgiveness for guilty individuals; it is the founding act of a new exodus people.

• Become what grace has declared you to be:

  Paul commands, “Purge out the old yeast,” and in the same breath says, “you are unleavened.” This is the rhythm of Christian holiness. The church does not cleanse itself in order to become God’s people; it cleanses because, in Christ, it has already been marked out as holy. Grace does not relax the call to purity; grace makes purity fitting, possible, and necessary.

• The whole Christian life is a feast of unveiled bread:

  “Let’s keep the feast” turns Passover from a calendar date into a way of life. Believers live continually in the light of redemption, leaving behind the old ferment of “malice and wickedness” and feeding on “sincerity and truth.” “Sincerity” speaks of unmixed purity, the opposite of a life corrupted from within. Paul is calling the church to transparent holiness before God, honest fellowship with one another, and a life free from the sourness of hidden corruption.

• The feast reaches toward the communion life of the church:

  Paul’s Passover language prepares for his later teaching about participation in the Lord’s Table. The church does not merely remember a past deliverance; it lives as a redeemed people who gather around Christ in covenant fellowship. For that reason, moral corruption and holy communion cannot be treated as though they belong together without contradiction.

Verses 9-13: Holy Boundaries at the Table

⁹ I wrote to you in my letter to have no company with sexual sinners; ¹⁰ yet not at all meaning with the sexual sinners of this world, or with the covetous and extortionists, or with idolaters, for then you would have to leave the world. ¹¹ But as it is, I wrote to you not to associate with anyone who is called a brother who is a sexual sinner, or covetous, or an idolater, or a slanderer, or a drunkard, or an extortionist. Don’t even eat with such a person. ¹² For what do I have to do with also judging those who are outside? Don’t you judge those who are within? ¹³ But those who are outside, God judges. “Put away the wicked man from among yourselves.”

• Holiness requires boundaries, not retreat from the world:

  Paul carefully distinguishes between the world the church is sent to reach and the fellowship the church is called to guard. If believers withdrew from every unbeliever marked by sin, they “would have to leave the world.” The gospel sends the church outward in witness, mercy, and truth. Separation is therefore not isolation from neighbors; it is refusal to baptize rebellion inside the covenant family.

• The covenant name “brother” increases accountability:

  The sharp line falls on “anyone who is called a brother.” The issue is not that unbelievers sin, but that one who bears Christ’s name while openly defying Christ seeks the privileges of fellowship without the obedience of discipleship. Profession creates responsibility. To carry the family name is to live under the Father’s order.

• Paul exposes respectable idols beside scandalous sins:

  The list in verse 11 is searching because it places sexual sin beside covetousness, idolatry, slander, drunkenness, and extortion. The church must not act as though only visibly shocking sins matter. Greed can be a liturgy of false worship, slander can murder communion with the tongue, and extortion can turn strength into predation. Paul treats these as fellowship-breaking because they all spring from hearts misruled by idols.

• The table declares recognition of shared life:

  “Don’t even eat with such a person” speaks to more than social preference. In the ancient world, shared meals publicly signaled acceptance, peace, and belonging. Within the church, table fellowship carried even greater weight because common meals stood near the holy gravity of the Lord’s Table. Paul therefore teaches that visible communion must not say “peace” where there is stubborn defiance against Christ.

• The church judges within because it is God’s holy household:

  Paul refuses to seize God’s office over “those who are outside,” yet he firmly charges the church to judge “those who are within.” This is not a license for censoriousness; it is a call to discernment within the covenant sphere entrusted to the church. His final line, “Put away the wicked man from among yourselves,” echoes the judicial language of Deuteronomy, and it also answers the earlier call that the offender “might be removed from among you.” The chapter is framed from beginning to end by the duty to purge evil from the midst of God’s people.

• Deuteronomy’s purge formula is carried into the church’s life under Christ:

  When Paul says, “Put away the wicked man from among yourselves,” he draws on a repeated covenant formula used when evil had to be removed from Israel’s midst. He does not flatten the church into the civil order of old covenant Israel, yet he does show that the same holy God still requires His assembled people to be marked by purity. The church stands as God’s covenant assembly under the lordship of Christ, and therefore cannot make peace with open wickedness in its own midst.

Conclusion: 1 Corinthians 5 reveals that church discipline is never a bare administrative act. Paul shows the church as a holy household that must grieve defilement, a gathered court acting under the authority of Jesus, a Passover people called to live out the meaning of the Lamb’s sacrifice, and a covenant fellowship whose boundaries protect both witness and restoration. The chapter presses believers to hate the leaven of tolerated sin, to cherish the cleansing Christ has accomplished, and to practice holiness with both firmness and hope, so that the body remains truthful and the sinner, by God’s mercy, may yet be saved in the day of the Lord Jesus.