What does 1 Corinthians 5:3 mean?
A man in the Corinthian church is known to be carrying on an affair with his father's wife. Incest of this kind was not tolerated either by the Jewish followers of the law or by Roman society, yet the Corinthian Christians had allowed it to continue among them without addressing it.Paul has written that they must act. First, they should mourn over this man's sin among them. One of their own is harming himself and others by living in ongoing sexual immorality instead of following the way of Jesus. In addition, they must immediately remove the man from their meetings.
This is not just a suggestion. Paul claims his authority as an apostle of Christ Jesus. He declares his spiritual presence with them—through this letter and their unity together in the Christ. It's not entirely clear if Paul means to say that he is also present with them in some additional supernatural sense through the power of the Holy Spirit.
In either case, Paul insists that he is present enough with them to declare this man guilty and command that he be removed from his place among the other Christians. Apparently, there was no question about whether this man was sleeping with his father's wife. Everyone knew it, and Paul used his authority to pass judgment on the man. His rationale will be explained in the following verses: the goal is to restore the man's spiritual health.
First Corinthians 5:1–8 contains Paul's primary example of how the Corinthian's pride and self-sufficiency is hurting their community. He has just asked if they would prefer he come in gentleness, or ''with a rod,'' symbolic of harsh judgment. Here, Paul details a grievous sin: the believers in Corinth have failed to rebuke a member who is committing incest with his father's wife. They must remove him from the church and turn him over to Satan in hopes of his ultimate salvation. This is also crucial for the health of the church—just as tiny bits of leaven eventually spread to an entire batch of dough, sin left unconfronted can poison an entire church.
Paul confronts the church in Corinth for failing to respond to a self-identified believer having a sexual affair with his father's wife. He insists they must remove the man from their community—to refuse his participation in the church—referred to here as delivering him to Satan. As the Jewish people would do during Passover, they must remove the leaven of this man and his sin from among them, to prevent it from spreading to the entire church. Christian congregations should not associate with those who claim to be believers, yet flaunt their sin.