²⁸ And you, dear brothers and sisters, are children of the promise, just like Isaac.

²³ The son of the slave wife was born in a human attempt to bring about the fulfillment of God’s promise. But the son of the freeborn wife was born as God’s own fulfillment of his promise.

²⁹ And now that you belong to Christ, you are the true children^[a] of Abraham. You are his heirs, and God’s promise to Abraham belongs to you.

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.”^[a]

¹³ Clearly, God’s promise to give the whole earth to Abraham and his descendants was based not on his obedience to God’s law, but on a right relationship with God that comes by faith. ¹⁴ If God’s promise is only for those who obey the law, then faith is not necessary and the promise is pointless. ¹⁵ For the law always brings punishment on those who try to obey it. (The only way to avoid breaking the law is to have no law to break!)

¹⁶ So the promise is received by faith. It is given as a free gift. And we are all certain to receive it, whether or not we live according to the law of Moses, if we have faith like Abraham’s. For Abraham is the father of all who believe. ¹⁷ That is what the Scriptures mean when God told him, “I have made you the father of many nations.”^[a] This happened because Abraham believed in the God who brings the dead back to life and who creates new things out of nothing.

¹⁸ Even when there was no reason for hope, Abraham kept hoping—believing that he would become the father of many nations. For God had said to him, “That’s how many descendants you will have!”^[b]

²⁵ You are the children of those prophets, and you are included in the covenant God promised to your ancestors. For God said to Abraham, ‘Through your descendants^[a] all the families on earth will be blessed.’