Galatians 3:16. “Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one. And to thy Seed, which is Christ.”
Both Ishmael and Isaac were the seed of Abraham, but Isaac was the child of the promise. Isaac was the one God had chosen to carry the promises into the next generation. His son, Jacob, became the father of the twelve tribes of Israel, and many generations later, the ultimate Seed of Abraham, Jesus Christ, came to fulfill the promise to Abraham. All the world has been blessed, just as God promised.
The blessing of Abraham was not given to the child he conceived with Sarah’s servant. That child was the result of Sarah’s efforts to take matters into her own hands and provide an heir for Abraham. Sarah’s decision to interfere with God’s plan has resulted in hundreds of years of bloodshed, hatred, claims and counterclaims, and political upheaval and unrest that exists and is growing in our own day.
Nevertheless, the blessing on the Seed of Abraham has been fulfilled, and all nations now have access to salvation by faith, through grace and the incredible love of the Father and of His Son, Jesus.