2:5-11 The apostle desires them to receive the person who had done wrong, again into their communion; for he was aware of his fault, and much afflicted under his punishment. Even sorrow for sin should not unfit for other duties, and drive to despair. Not only was there danger last Satan should get advantage, by tempting the penitent to hard thoughts of God and religion, and so drive him to despair; but against the churches and the ministers of Christ, by bringing an evil report upon Christians as unforgiving; thus making divisions, and hindering the success of the ministry. In this, as in other things, wisdom is to be used, that the ministry may not be blamed for indulging sin on the one hand, or for too great severity towards sinners on the other hand. Satan has many plans to deceive, and knows how to make a bad use of our mistakes.

10. Another encouragement to their taking on themselves the responsibility of restoring the offender. They may be assured of Paul's apostolic sanction to their doing so.

for if I forgave anything, to whom I forgave it—The oldest manuscripts read, "For even what I have forgiven, if I have forgiven anything."

for your sakes forgave I it—He uses the past tense, as of a thing already determined on; as in 1Co 5:3, "I have judged already"; or, as speaking generally of forgiveness granted, or to be granted. It is for your sakes I have forgiven, and do forgive, that the Church (of which you are constituent members) may suffer no hurt by the loss of a soul, and that ye may learn leniency as well as faithfulness.

in the person of Christ—representing Christ, and acting by His authority: answering to 1Co 5:4, "In the name of our Lord Jesus Christ … my spirit, with the power of our Lord Jesus Christ."