“A little leaven leavens the whole lump” (Galatians 5:9 ESV).
Paul used a proverb about leaven to warn the Galatian believers about the corrupting influence of legalism. Leaven was essentially yeast, often preserved in a small piece of fermented dough from an earlier batch. When that small piece was kneaded into fresh dough, the yeast gradually spread its fermenting influence through the entire lump, causing the whole batch to rise.
The Judaizers were not telling the Galatians to reject Jesus. Their message was more subtle: believe in Jesus, but also be circumcised and keep the law in order to be fully accepted by God.
Circumcision may have seemed like a small addition, but Paul understood the enormous theological principle behind it. Like a little leaven, legalism could quietly spread until it affected the whole gospel. Paul was guarding the sufficiency of Christ alone. We cannot add anything to Christ as the basis of our acceptance with God without subtracting from the sufficiency of Christ. “Christ plus” anything eventually becomes “Christ is not enough.”
We must guard our hearts against adding our performance to the finished work of Christ. We do not need Christ plus rule-keeping, Christ plus religious achievement, or Christ plus our own righteousness.
In Christ, we have been saved by God’s grace through faith (Eph. 2:8). By faith, we receive a righteousness that is not our own but comes through Christ (Phil. 3:9).
Our obedience matters, but it is the fruit of salvation, never the basis of it. We obey because we have been accepted in Christ, not in order to become accepted.
Let us rest fully in Jesus. A little legalism hurts the gospel because it quietly suggests that Christ is not enough. But Christ is more than enough. In Him, we have been blessed with “every spiritual blessing in the heavenly places” (Eph. 1:3).
PRAYER: Dear Father, keep us from trusting in our own performance as the basis for your acceptance. Help us rest completely in the finished work and perfect righteousness of Christ. Guard us from legalism and teach us to obey You from hearts transformed by Your grace. In Jesus’ name, amen.