Church discipline is often misunderstood, but it is a biblical command rooted in love and holiness. The Apostle Paul teaches the church how to respond when someone refuses to obey apostolic instruction. In today’s context, apostolic instruction is the NT. Is the OT included? Yes, since the Law, the Prophets, and the Psalms proclaimed Christ either in shadow or prophecy.
Yet, one must study the OT through the apostolic lens, the NT. The goal of Church discipline is not rejection but restoration. It has OT roots, but it is applied in the church. The method is not hostility but withdrawal. The text cited commands the church to disengage from the unrepentant, maintain a posture of love, and guard the unity and purity of the body through faithful obedience to Christ’s command.