Exodus 19:6

And ye shall be unto Me a kingdom of priests, kings, in order to conquer the heathen, and priests, in order to serve the living God, and an holy nation, a nation consecrated, set apart, for the service of Jehovah, and therefore under obligation to lead a life of sanctification before Him. These are the words which thou shalt speak unto the children of Israel. That was the solemn, welcoming message which the Lord sent to the people whom He had chosen. In this respect the children of Israel were a type of the New Testament Church, the chosen generation, the royal priesthood, the peculiar nation, 1 Peter 2:9; for Christ has made us kings and priests unto God and His Father, Revelation 1:6. As such we should show forth the praises of Him who has called us out of darkness into His marvelous light.