day no. 16,307: father Abraham had many sons

Romans 9:6-8

But it is not as though the word of God has failed. For not all who are descended from Israel belong to Israel, and not all are children of Abraham because they are his offspring, but “Through Isaac shall your offspring be named.” This means that it is not the children of the flesh who are the children of God, but the children of the promise are counted as offspring.

Father Abraham had many sons, but only one son of promise. Just because you can claim Abraham as an ancestor does not mean you can claim faith as your inheritance. Ishmael had a greater chronological claim to Abraham than David, but David had a greater theological claim to Abraham than Ishmael. The sons of faith and promise are the true sons of Abraham and the true Israel. Not all those who have Israel in their DNA are children of the inheritance. Many who have not a drop of Abrahamic blood in their veins by birth have Abrahamic blood applied to them by rebirth. Only those who are born again are truly born of Abraham. No one is born into Abraham for salvation by genetics, but all who are born again by faith into him are saved.

John 1:12-13

As many as received him, to them gave he power to become the sons of God, even to them that believe on his name: Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.