In our study of 1 Corinthians chapter five, we look at purity in the family of God. We have all had sickness and taken some really bad tasting medicine. That is kinda what is happening here as Paul dishes out some strong medicine for the church in hopes of curing an illness that had come into the body of Christ in Corinth.
"It is actually reported that their is sexual immorality among you, and of a kind that does not occur even among pagans: A man has his father's wife." NIV translation
In chapter 4, Paul spoke of the authority that had been given to him as an apostle designated by Jesus Christ. Based on that authority, he begins to address a problem that was happening in the church at Corinth. He describes a sexual sin that was happening among the family of God and was so outrageous that even the pagans wouldn't have thought of doing such a thing.
"And you are proud! Shouldn't you rather have been filled with grief and have put out of your fellowship the man who did this?" NIV translation
The fact that this was going on must have been known by everyone in the group of believers and they were ok with it.
Instead of being filled with sorrow and pity for the one that was doing so, they were still meeting with the man as if nothing was happening.
"Even though I am not physically present, I am with you in spirit. And I have already passed judgment on the one who did this, just as if I were present." NIV translation
Paul, as a leader, has found what this man was doing to be against the Word of God. Because of that and the fact that the man was not repenting of the action, Paul says that he has passed judgment on the man. When he says this, he is not talking about the man's salvation but the fact that his actions do not line up with God's Word.
"When you are assembled in the name of our Lord Jesus and I am with you in spirit, and the power of our Lord Jesus is present, hand this man over to Satan, so that the sinful nature may be destroyed and his spirit saved on the day of the Lord." NIV translation
Paul tells the group of believers to "hand this man over to Satan" and it may seem harsh but what he is saying is that sometimes people have to hit a low point before they can look up and see the grace of God. The purpose in this is to bring the man to repentance and salvation.