The Kingdom of God is an entity that causes great confusion among Christians today. . In part, this is because many believe that all born-again believers are automatically in the Kingdom of God, whereas scripture clearly shows that while salvation as part of the body of Christ is unconditional and cannot be lost, service in God's kingdom as part of His collective people is conditional and can be forfeited through error, disobedience and unbelief. This book explains how these principles operated under the Old Covenant and currently function under the New Covenant, and concludes by exploring what God's eternal purposes ultimately are for His Kingdom.