In 1 Corinthians 5, the Apostle Paul addresses a serious issue of immorality within the church. He is appalled that the church is tolerating a man who is living in an immoral relationship with his father's wife. Paul instructs the church to take action and remove the man from their fellowship. He also warns them not to associate with anyone who claims to be a believer but is living in sin.
Paul then goes on to explain the importance of holiness and purity within the church. He encourages the church to live in a way that is pleasing to God and to avoid any kind of immoral behavior. He also warns them against judging others, as only God can judge.
Paul then gives the church practical advice on how to deal with the situation. He instructs them to hand the man over to Satan for the destruction of his flesh, so that his spirit may be saved. He also encourages them to forgive and comfort the man when he repents.
Overall, Paul is emphasizing the importance of holiness and purity within the church. He is also warning the church against tolerating any kind of immoral behavior. He is encouraging them to take action and to forgive and comfort those who repent.