1 Corinthians 5:6
Your boasting is not good. Do you not know that a little leaven leavens the whole lump?
English Standard Version (ESV)
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Paul is saying that this one persistent, unrepented sin isn't just a private matter; it's like a tiny bit of yeast that will spread and affect the entire community, the whole "lump" of believers. Don't think you can contain it; the very nature of sin is to grow and corrupt everything it touches.
Paul is addressing a severe case of sexual immorality within the Corinthian church, where a man is openly living with his father's wife, something even pagans would condemn. He's calling out their pride in their so-called spiritual maturity, urging them to instead confront the sin within their community before it corrupts everyone. This warning about leaven directly follows his command for them to expel the unrepentant sinner from their midst.
Paul calls out the Corinthians' pride, but not just any pride. It's a pride connected to sin! This verse reveals how what seems small can have huge consequences for everyone.
When Pride Meets Sin
The church in Corinth had a problem: they were proud of something that was actually deeply sinful – a man living openly with his father's wife. Paul tells them, "Your boasting is not good." It’s a strong statement. Their pride wasn't just misplaced; it was actively harming the spiritual health of the whole community. This tells us that pride, especially when it excuses or ignores sin, is a destructive force.
The Church's Role
Instead of confronting the sin, they were boasting about their tolerance or perhaps their perceived spiritual maturity in handling it. Paul's point is that their pride was enabling the sin to spread and become accepted. A healthy church confronts sin, it doesn't celebrate its presence. This makes us ask: what are we tolerating or even boasting about that might be hurting God's people?
What does leaven have to do with sin? Paul uses this everyday baking ingredient to illustrate how quickly and thoroughly sin can corrupt everything it touches.
The Power of Leaven
In ancient Jewish culture, leaven (yeast) was often associated with corruption and sin. It's what makes dough rise, expanding it and changing its nature. Paul uses this vivid image: "a little leaven leavens the whole lump." Just a tiny bit of yeast can transform an entire batch of dough.
Sin's Insidious Nature
This isn't just about baking; it's about spiritual reality. A single sin, especially one that is tolerated or celebrated within a community, can spread like yeast. It can gradually corrupt the purity, holiness, and unity of the church. The sin that seems small or isolated at first can eventually influence everyone's attitudes, behaviors, and spiritual condition. It’s a warning against complacency. We can't afford to dismiss sin as insignificant, because its potential for damage is immense.
Understand the original words
kauchēma · Greek Noun
A self-confident pride that relies on human achievement or status rather than on God, often involving arrogance or an inflated sense of one's own importance. In a spiritual context, it is condemned as incompatible with reliance on divine grace.
zymē · Greek Noun
A small portion of fermented dough used to make bread rise, used metaphorically in Scripture to represent the pervasive, contagious, and corrupting influence of sin, false teaching, or moral evil within a community.
The Corinthian church was a young, dynamic community facing significant internal struggles with sin and doctrinal confusion, making Paul's urgent, corrective language in 1 Corinthians essential for their spiritual health.
c. AD 48-50
Paul's First Missionary Journey
Paul and Barnabas establish churches in various cities in Asia Minor, including Corinth.
c. AD 50-52
Paul's Ministry in Corinth
Paul spends about 18 months in Corinth, founding the church and teaching them. This period is crucial for understanding the initial context of his letters.
c. AD 53-57
Paul's Third Missionary Journey
Paul revisits churches, including potentially communicating with Corinth from Ephesus.
c. AD 55— this verse
Writing of 1 Corinthians
Paul writes 1 Corinthians from Ephesus in response to reports about the church's divisions, immorality, and doctrinal issues, including the specific case of incest mentioned in chapter 5.
Paul reiterates the same danger of a small influence corrupting the whole group, warning against false teachings that spread like leaven.
Matthew 13:33Jesus uses the parable of leaven to illustrate how the Kingdom of Heaven, though small in its beginnings, will powerfully influence and transform everything it touches.
1 Corinthians 15:33This verse warns against bad company, stating that 'bad company corrupts good character,' which is a direct parallel to the 'little leaven' idea infecting the whole church.
Exodus 12:15The Old Testament law commanded the removal of leaven during Passover, highlighting its association with sin and corruption that must be purged.
Paul is saying that this one persistent, unrepented sin isn't just a private matter; it's like a tiny bit of yeast that will spread and affect the entire community, the whole "lump" of believers. Don't think you can contain it; the very nature of sin is to grow and corrupt everything it touches.
Paul is addressing a severe case of sexual immorality within the Corinthian church, where a man is openly living with his father's wife, something even pagans would condemn. He's calling out their pride in their so-called spiritual maturity, urging them to instead confront the sin within their community before it corrupts everyone. This warning about leaven directly follows his command for them to expel the unrepentant sinner from their midst.
Paul is addressing a severe case of sexual immorality within the Corinthian church, where a man is openly living with his father's wife, something even pagans would condemn. He's calling out their pride in their so-called spiritual maturity, urging them to instead confront the sin within their community before it corrupts everyone. This warning about leaven directly follows his command for them to expel the unrepentant sinner from their midst.
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c. AD 57
Paul's Visit to Corinth
Paul likely makes a painful visit to Corinth, which may have influenced the tone of his later letters to them.
c. AD 57
Writing of 2 Corinthians
Following his visit, Paul writes 2 Corinthians, likely dealing with the aftermath of the issues addressed in 1 Corinthians.
"Your boasting is not good. Do you not know that a little leaven leavens the whole lump?" — Paul is saying that this one persistent, unrepented sin isn't just a private matter; it's like a tiny bit of yeast that will spread and affect the entire community, the whole "lump" of believers.…
