He will go before him in the spirit and power of Elijah, 'to turn the hearts of the fathers to the children,' and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord."
In the book of Revelation, again, that glorious song that Handel has put to music, "King of Kings and Lord of Lords, forever and ever, hallelujah, hallelujah."So the angel is telling about the eternal reign of Jesus Christ.