1-е Коринфянам 5:6

Your glorying in your own attainments and those of your favorite teachers (Co1 3:21; Co1 4:19; Co1 5:2), while all the while ye connive at such a scandal, is quite unseemly. a little leaven leaveth . . . whole lump-- (Gal 5:9), namely, with present complicity in the guilt, and the danger of future contagion (Co1 15:33; Ti2 2:17).

In this chapter the apostle, I. Blames them for their indulgence in the case of the incestuous person, and orders him to be excommunicated, and delivered to Satan (Co1 5:1-6). II. He exhorts them to Christian purity, by purging out the old leaven (Co1 5:7, Co1 5:8). And, III. Directs them to shun even the common conversation of Christians who were guilty of any notorious and flagitious wickedness (Co1 5:9 to the end).

5:6-7 Yeast was often a symbol of sin (cp. Matt 16:6, 12; Mark 8:15; Luke 12:1; Gal 5:9). Jews ceremonially cleansed their homes of yeast before the annual Passover meal (Exod 12:19; 13:7). • Get rid of . . . this wicked person: Sin, if unaddressed, could spread throughout the church, just as yeast spreads throughout a batch of dough.