Acts 3:25 states, “And you are heirs of the prophets and of the covenant God made with your fathers. He said to Abraham, ‘Through your offspring, all peoples of the earth will be blessed.’” This promise was given to Abraham in Genesis 22:18 and again to his son Isaac in Genesis 26:4. The original covenant God gave to Abraham in Genesis 22:15-18 is unilateral, and applies to the entire human race.
In Genesis 22:17, God told Abraham that his descendants will multiply greatly – as the stars in the sky and as the sand on the seashore. The “seed as the stars” refers to the heavenly seed of Abraham, Christ and the Church. Jesus was the first of the heavenly seed, the Captain or forerunner. These “stars” are the “heirs” of Galatians 3:29 and 1 Corinthians 15:41-42.
The “sand” seed is the nation of Israel. However, the Jews will need to accept Jesus as their savior before God can use them to bless the world. Zechariah 12:10 (NKJV), “And I will pour on the house of David and on the inhabitants of Jerusalem the Spirit of grace and supplication; then they will look on Me whom they pierced. Yes, they will mourn for Him as one mourns for his only son, and grieve for Him as one grieves for a firstborn.” Then Romans 11:26-27, 29 will be fulfilled. “And so all Israel will be saved, as it is written:… ‘For this is My covenant with them, When I take away their sins.’…For the gifts and the calling of God are irrevocable.”
Christ (the heavenly seed) and Israel (the earthly seed) will be the channel of blessings to all nations. Isaiah 2:2-3 (NKJV), “…in the latter days that the mountain of the LORD’s house shall be established on the top of the mountains, And shall be exalted above the hills; And all nations shall flow to it. Many people shall come and say, ‘Come, and let us go up to the mountain of the LORD, To the house of the God of Jacob; He will teach us His ways, And we shall walk in His paths.’ For out of Zion (from Christ) shall go forth the law, And the word of the LORD from Jerusalem (Israel).”
Zechariah 8:22-23 (NKJV), “Yes, many peoples and strong nations Shall come to seek the LORD of hosts in Jerusalem, And to pray before the LORD…In those days ten men from every language of the nations shall grasp the sleeve of a Jewish man, saying, Let us go with you, for we have heard that God is with you.”