1 Corinthians 5:8 Commentary: Keeping the Feast with Sincerity and Truth

Paul wrote this letter likely in the spring, near the time of the Jewish Passover (see 1 Corinthians 16:8). The Passover and the Feast of Unleavened Bread commemorated Israel’s exodus from Egypt, when God commanded households to remove all leaven for seven days (Exodus 12:15; 13:6). Leaven became a standard Jewish symbol for corruption and sin, because a small amount permeates and sours the whole batch. Jesus used the same image (Matthew 16:6; Luke 12:1). In Corinth, the church included both Jewish and Gentile converts. The Jewish members would immediately recognize the imagery; the Gentile members, many of whom had been attached to pagan cults, would understand the idea of moral purity required for worship. Paul’s specific concern is a case of incest that the church tolerated (1 Corinthians 5:1-2). He argues that tolerating such sin is like keeping leaven in the house during Passover, it defiles the whole community. So “keep the feast” is not a suggestion to observe a calendar ritual, but a command to live in the reality that Christ’s once-for-all sacrifice has made the church a new, unleavened lump (v.7). The Greek verb heortazōmen appears only here in the New Testament (Vincent). It is a present subjunctive, suggesting an ongoing, repeated celebration, the whole Christian life is to be a festival of holiness.

The primary variant noted by Clarke replaces πονηρίας (wickedness) with πορνείας (fornication), found in a few ancient manuscripts. This reading would connect the verse directly to the incest case (v.1). However, most manuscripts and the majority of commentators (including the UBS Greek text) support πονηρίας. No other significant variants are noted in the supplied sources for this verse.

From the patristic period forward, this verse has been central to teaching on Christian holiness and the Lord's Supper. The Council of Trent cited it to argue for preparation before receiving the Eucharist, while Reformed and Anabaptist traditions used it to support church discipline. John Calvin saw here a refutation of the Mass as a daily sacrifice: the feast is a lifelong celebration of the once-for-all offering of Christ. Puritan writers often expounded the verse to encourage self-examination and the removal of ‘secret leaven’ from the heart. In modern Protestant lectionaries, it is read during Lent and Eastertide, connecting the Christ’s death to the believer’s call to purity.

Three-point outline

1. Christ our Passover has been sacrificed. The foundation of the feast is Christ’s death for us. We do not make the feast by our own efforts; we enter it because the Lamb was slain.
2. We must purge the old leaven. The old life of malice and wickedness, including any tolerated sin in the church, must be removed. A little leaven leavens the whole lump (v.6).
3. The feast is lived in sincerity and truth. Transparent purity of heart and life, grounded in the truth of the gospel, is the proper bread of the Christian festival.

Five-point outline

1. The Feast, Not a one-day event but a whole-life celebration of deliverance in Christ.
2. The Old Leaven, Our former way of life, the sinful patterns we brought from Judaism or paganism (Barnes).
3. The Specific Leaven, Malice (inner corruption) and wickedness (outward evil acts) (Jamieson-Fausset-Brown).
4. The Unleavened Bread, Sincerity and truth: a life open to God’s light, and a community grounded in God’s Word.
5. The Action, Remove the offending person from fellowship as a concrete act of obedience, which protects the whole church.

Illustration hooks

• A baker knows that a speck of old starter will affect the entire dough overnight. One small compromise can sour a church’s witness.
• Spring cleaning: before a holiday, we sweep out corners we ignore all year. The call to purge leaven is a regular spiritual spring cleaning.
• A wedding feast: you don’t invite guests and serve spoiled food. The feast of Christ deserves the best, hearts free from malice.

Questions your congregation is asking

• Is Paul saying we have to be perfect before we come to the Lord’s Table?
• What about Christians who struggle with sin but are trying? Does that leaven still affect the church?
• How does “sincerity and truth” relate to the church discipline described in the surrounding verses?

Paul uses a very concrete image, Passover leaven, to teach about holiness in the church. The Corinthians were proud of their tolerance, but Paul shows that tolerating sin actually ruins the feast. As you discuss, focus on how this metaphor works: what does it mean to “keep the feast” today, and what kinds of “leaven” might we need to remove from our own lives and church community?

Discussion questions

1. Read Exodus 12:14-20. Why was leaven so strictly forbidden during Passover? What does that tell us about God’s view of sin?
2. Paul says “Christ, our Passover, has been sacrificed.” How does that truth change the way we approach sin and celebration?
3. The word for “sincerity” (eilikrineia) was sometimes linked to examining something by sunlight. What would it mean to live a life that can withstand God’s searching light?
4. In verse 6, Paul says “a little yeast leavens the whole lump.” How have you seen a small sin affect a whole church or family?
5. The immediate context is about removing a man living in incest. How does that hard case help us understand the general principle about personal purity?
6. Some commentators think “keep the feast” refers to the Lord’s Supper, others to the whole Christian life. Which view fits the passage better, and why?
7. What is one “old leaven” you need to purge this week, a habit, an attitude, a relationship, so that you can celebrate Christ more fully?