13 What Paul Means by 'A Little Leaven Leavens the Dough' (1 Corinthians 5:6-13)

When a church treats ongoing, defiant sin as acceptable, it is not being gracious—it is quietly undermining the very gospel it claims to believe. In this episode on 1 Corinthians 5:6–13, Krisan Marotta unpacks Paul’s leaven and Passover imagery, his instructions about “not associating” with certain people, and his concern that the Corinthians are boasting in their tolerance instead of grieving over rebellion against God. In this week’s episode, we explore:Why Paul says “your boasting is not good,” and how the church’s proud tolerance of blatant immorality reveals a deeper problem of arrogance toward God’s truth What the leaven metaphor means in context—and why Krisan argues that the “leaven” is not one bad apple in an otherwise healthy church, but a casual, rebellious attitude toward sin itselfHow Paul’s Passover imagery—cleaning out old leaven, Christ our Passover Lamb, and a “new lump” of dough—paints a picture of leaving pagan ways behind and embracing a new life shaped by the gospelThe difference between believers who still struggle with sin and grieve it, and those who openly justify, celebrate, or refuse to repent of what God clearly calls wrong What Paul clarifies about his previous letter: why “not associating with immoral people” cannot mean withdrawing from the world, but does mean taking a clear stand with so-called brothers who defiantly reject God’s commandsHow “not even to eat with such a one” may relate to the early church’s fellowship meal that symbolized unity in Christ—and why that matters for how we think about church discipline todayA thoughtful vision of the church as an extended family of fellow travelers in faith, not an institution that protects itself by cutting people off, yet also not a social club that affirms everyone’s choices without discernmentThe two extremes churches can fall into—ignoring sin for the sake of harmony, or wielding discipline like a scalpel—and what it might look like to stay humbly committed to both mercy and moral truthAfter listening, you’ll come away with a clearer understanding of what Paul is (and is not) asking the Corinthians to do in this challenging passage, and how his counsel speaks into modern questions about tolerance, judgment, and church discipline. You’ll be invited to take sin seriously without losing sight of your own need for grace, to refuse both self-righteous harshness and easy-going compromise, and to care enough about others’ eternal good to be honest about which path leads to life and which leads to death. Series: 1 Corinthians: Pride & Prejudice in the ChurchMost people fail at Bible study because no one ever taught them how. Bible Study Boot Camp fixes that: one short email a day for a week, plus a worksheet you can use on any passage for the rest of your life.Sign up for Bible Study Boot Camp