Jesus preached the gospel of the kingdom of God and taught about its values throughout his ministry. All four gospels endorse this fact. The disciples continued to preach the gospel of the kingdom for two generations but during the second century things began to change and by the fourth century when Christianity became a state religion, the gospel of the kingdom of God was changed to the gospel of personal salvation. This error had a catastrophic effect on the life of the church. The early church followed the values of the kingdom Jesus outlined in the Sermon on the Mount. Whereas today, we are mainly concerned with the salvation of the soul and the importance of God's kingdom, and its values are lost. The church must reclaim the gospel of the kingdom and follow its values, to demonstrate the beauty of the kingdom that the world may believe in Jesus.