I Corinthians 5:2

puffed up--with your own wisdom and knowledge, and the eloquence of your favorite teachers: at a time when ye ought to be "mourning" at the scandal caused to religion by the incest. Paul mourned because they did not mourn (Co2 2:4). We ought to mourn over the transgressions of others, and repent of our own (Co2 12:21) [BENGEL]. that--ye have not felt such mourning as would lead to the result that, &c. taken away from among you--by excommunication. The incestuous person was hereby brought to bitter repentance, in the interval between the sending of the first and second Epistles (Co2 2:5-10). Excommunication in the Christian Church corresponded to that in the Jewish synagogue, in there being a lighter and heavier form: the latter an utter separation from church fellowship and the Lord's house, the former exclusion from the Lord's Supper only but not from the Church.

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).

5:2 The Corinthian Christians were proud (see 4:8, 10, 18; 5:6), when they should have been mourning in sorrow and shame over such sin among them. • remove this man from your fellowship: This instruction might presuppose that the man had refused their appeals, or that such blatant sin required immediate discipline (cp. Matt 18:15-18).