⁷ Being descendants of Abraham doesn’t make them truly Abraham’s children. For the Scriptures say, “Isaac is the son through whom your descendants will be counted,”^[a] though Abraham had other children, too. ⁸ This means that Abraham’s physical descendants are not necessarily children of God. Only the children of the promise are considered to be Abraham’s children. ⁹ For God had promised, “I will return about this time next year, and Sarah will have a son.”^[b]