He shall have dominion also from sea to sea, and from the river unto the ends of the earth.
All Commentaries on Psalms 72:8 Go To Psalms 72
Augustine of Hippo
AD 430
11. "And He shall be Lord from sea even unto sea, and from the river even unto the ends of the round world" (ver. 8): He to wit concerning whom he had said, "There shall arise in His days justice and abundance of peace, until the moon be exalted." If the Church here is properly signified under the term moon, in continuation he showed how widely that same Church He was going to spread abroad, when He added, "and He shall be Lord from sea even unto sea." For the land is encircled by a great sea which is called the Ocean: from which there floweth in some small part in the midst of the lands, and maketh those seas known to us, which are frequented by ships. Again, in "from sea even unto sea" He hath said, that from any one end of the earth even unto any other end, He would be Lord, whose name and power in the whole world were to be preached and to prevail exceedingly. To which, that there might not be understood in any other manner, "from sea even unto sea:" He immediately added, "and from the river even unto the ends of the round world." Therefore that which He saith in "even unto the ends of the round world," the same He had said before in "from sea even unto sea." But in that which now He saith, "from the river," He hath evidently expressed that He willed Christ to publish at length His power from that place from whence also He began to choose His disciples, to wit from the river Jordan, where upon the Lord, on His baptism, when the Holy Ghost descended, there sounded a voice from Heaven, "This is My beloved Son." From this place then His doctrine and the authority of the heavenly ministry setting out, is enlarged even unto the ends of the round world, when there is preached the Gospel of the kingdom in the whole world, for a testimony unto all nations: and then shall come the end.