Genesis 22:18

and in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice. A solemn declaration and prophecy, supported by the strongest oath which the Lord may swear, by Himself. The extent of the promise, which points forward to a numberless progeny, to the complete overthrow of all enemies, and especially to the fact that in his Seed, in the one great Seed of the woman, all nations of the earth should be blessed, precludes the understanding of a mere temporal blessing. It is chiefly to this blessing that St. Paul refers when he writes: "He saith not, And to seeds, as of many; but as of one, ‘And to thy Seed,' which is Christ," Galatians 3:16. In Christ all nations of the earth are blessed; in His power the people of God, the spiritual descendants of Abraham, conquer all their enemies. That is the victory which overcometh the world, even our faith.