Isaiah 9:7

Of the Increase of His government, in extending the boundaries of His spiritual kingdom, and peace there shall be no end, that is, He brings about a condition of eternal peace between God and man, upon the throne of David and upon his kingdom, for the kingdom of Christ is the kingdom of David, continued and established in the spiritual sense, to order it and to establish it with judgment and with justice from henceforth even forever; for the fact that Christ endured the judgment, the punishment of sin, that He satisfied the justice of God, brought about the foundation of His kingdom, upon the fact of His atonement He builds up His Church. The zeal of the Lord of hosts, the eagerness of His love in seeking the salvation of mankind, will perform this. All this was fulfilled in the Son of Mary, of whom the angel says: "He shall be great and shall be called the Son of the Highest; and the Lord God shall give unto Him the throne of His Father David, and He shall reign over the house of Jacob forever, and of His kingdom there shall be no end.. That Holy Thing which shall be born of thee shall be called the Son of God. " Luke 1:32.