This short eBook surveys church history and reveals the purity and power of the church is directly related to the purity and power of the gospel that is preached and practiced. A prime example of this connection is the Protestant Reformation, which only restored half of the gospel. In practice, the Reformation restored the gospel of how "the righteous are saved by faith," but never restored the whole gospel of how "the righteous will live by faith." ­The result is most Christians do not know how to overcome sin and live by faith in Jesus Christ who indwells them by His Spirit. Yet this is the central purpose of Christ's death on the cross and the cornerstone of the New Covenant church. In addition to diagnosing the crux of the problem facing today's church, this book presents the remedy - a model of how the New Covenant church would work based on the complete gospel of Christ and Scriptural teaching on church life.