1 Corinthians 5:1-2, Dealing With Sin
The church that does not deal with sin but allow sin to fester taints and compromises the testimony of Christ in His body. The church consists of God’s people called out from the world unto holiness with God. When the church allows the world and its filth into the church, it loses its divine power. The purpose of dealing the sin is help the errant believer come back to God. It is restorative.