1 Corinthians 5:1-5

"It is actually reported that there is sexual immorality among you, and of a kind that does not occur even among pagans: A man has his father's wife. 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? 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. 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."

Sin MUST be dealt with

(especially in the Lord's church)

If sin is left unchecked, it becomes an infection that can hurt the whole church. It is difficult to confront the person and correct them, however, it gives the person an opportunity to receive a cure for their sin. Some situations cannot be ignored, nor should they be. Paul was telling the church that it had a responsibility to maintain the standards of morality found in God's commandments. God tells us not to judge others, but he also tells us not to tolerate flagrant sin, because of the dangerous influence on other believers.