2 You are so proud of yourselves, but you should be mourning in sorrow and shame. And you should remove this man from your fellowship. 3 Even though I am not with you in person, I am with you in the Spirit. And as though I were there, I have already passed judgment on this man 4 in the name of the Lord Jesus. You must call a meeting of the church. I will be present with you in spirit, and so will the power of our Lord Jesus. 5 Then you must throw this man out and hand him over to Satan so that his sinful nature will be destroyed and he himself will be saved on the day the Lord returns. 6 Your boasting about this is terrible. Don't you realize that this sin is like a little yeast that spreads through the whole batch of dough?
7 Get rid of the old "yeast" by removing this wicked person from among you. Then you will be like a fresh batch of dough made without yeast, which is what you really are. Christ, our Passover Lamb, has been sacrificed for us.
Matthew Henry's Commentary on 1 Corinthians 5:2-7
Commentary on 1 Corinthians 5:1-8
(Read 1 Corinthians 5:1-8)
The apostle notices a flagrant abuse, winked at by the Corinthians. Party spirit, and a false notion of Christian liberty, seem to have saved the offender from censure. Grievous indeed is it that crimes should sometimes be committed by professors of the gospel, of which even heathens would be ashamed. Spiritual pride and false doctrines tend to bring in, and to spread such scandals. How dreadful the effects of sin! The devil reigns where Christ does not. And a man is in his kingdom, and under his power, when not in Christ. The bad example of a man of influence is very mischievous; it spreads far and wide. Corrupt principles and examples, if not corrected, would hurt the whole church. Believers must have new hearts, and lead new lives. Their common conversation and religious deeds must be holy. So far is the sacrifice of Christ our Passover for us, from rendering personal and public holiness unnecessary, that it furnishes powerful reasons and motives for it. Without holiness we can neither live by faith in him, nor join in his ordinances with comfort and profit.