How to prevent sin from spreading?
How can we ensure sin doesn't spread like "yeast" in our community?

The Warning in 1 Corinthians 5:6

“Your boasting is not good. Do you not know that a little yeast leavens the whole batch of dough?” (1 Corinthians 5:6)


Understanding the Yeast Illustration

• Yeast is tiny, yet it works through the entire lump.

• Scripture uses the image to show how hidden or tolerated sin spreads—Matthew 16:6; Galatians 5:9.

• What appears “small” today becomes a community-wide problem tomorrow.


Taking Sin Seriously

Proverbs 14:34—“Righteousness exalts a nation, but sin is a disgrace to any people.”

Romans 12:9—“Detest what is evil; cling to what is good.”

• Treat sin as dangerous, never “harmless,” because Scripture says it never stays contained.


Practicing Biblical Accountability

Matthew 18:15-17 outlines one-on-one confrontation, then small-group, then church involvement.

Galatians 6:1-2 speaks of restoring the one caught in sin “in a spirit of gentleness,” while bearing one another’s burdens.

James 5:19-20 reminds that turning a sinner from error “will save his soul from death.”

Steps:

– Notice.

– Speak truth in love.

– Follow through, not giving up until repentance or discipline occurs.


Maintaining Pure Doctrine

2 Timothy 4:2-3—“Preach the word…for the time will come when men will not tolerate sound doctrine.”

Titus 1:9 urges leaders to “encourage others by sound teaching and refute those who contradict it.”

When teaching is sound, behavior is corrected before it can ferment.


Cultivating Personal Holiness

1 Peter 1:15-16—“Be holy in all you do.”

Hebrews 12:14—“Pursue peace with everyone, and holiness, without which no one will see the Lord.”

Daily habits: prayer, Scripture intake, confession, obedience. Holy individuals form a holy community.


Guarding Fellowship through Church Discipline

1 Corinthians 5:2, 5 shows Paul calling for removal of unrepentant sin to protect the church.

2 Thessalonians 3:6 tells believers to “keep away from every brother who walks in idleness.”

Purpose: not punishment for punishment’s sake, but restoration of the sinner and protection of the flock.


Promoting Transparency and Repentance

1 John 1:7—“If we walk in the light…we have fellowship with one another.”

1 John 1:9—“If we confess our sins, He is faithful and just to forgive us.”

Proverbs 28:13—“He who conceals his sins will not prosper, but whoever confesses and renounces them finds mercy.”

A culture of honest confession stops yeast before it multiplies.


Fueling the Community with Love and Grace

Ephesians 4:15—“Speaking the truth in love, we will in all things grow up into Christ.”

Colossians 3:12-14 calls us to compassion, kindness, humility, gentleness, patience, and, above all, love.

Love motivates discipline and restores the fallen; grace ensures no one is forever labeled by past failures.


Keeping Our Eyes on Christ

Hebrews 12:1-2—“Let us throw off every encumbrance and the sin that so easily entangles…fixing our eyes on Jesus.”

Christ’s purity and sacrifice both convict and empower us. As each believer stays close to Him, the “yeast” of sin loses its power to spread.

Summary Steps to Stop the Spread:

1. Recognize even “small” sin as dangerous.

2. Confront lovingly and quickly.

3. Hold fast to sound doctrine.

4. Pursue personal holiness daily.

5. Apply church discipline when needed.

6. Foster transparency, repentance, and restoring grace.

7. Keep Christ central—He is the antidote to every corrupting influence.

What does 1 Corinthians 5:6 teach about tolerating sin within the church?
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