The letter to this church is the longest of the seven, though addressed to the church in the smallest of the seven cities. It has an important message for the church today: false doctrine and sin are not to be allowed—even under the banner of love, toleration, and unity. There may be much that is commendable in a church. It may appear on the surface to have an effective ministry, be growing numerically, and even have cordial society. Yet immorality and false doctrine, if not confronted, will bring