Romans 9:6-13 explains how God’s people and the seed of promise are not a natural but a spiritual seed.
That is not true. Paul is arguing that the descendants who will in inherit the promise God made to Paul's kinsmen of the flesh are those whom God has chosen.
God’s people are not a physical race but a spiritual race.
Paul argues that God promised salvation to his fellow Israelites -- his kinsmen of the flesh. He begins by comparing two descendants of Abraham, followed by a comparison of two descendants of Jacob. In the end, he concludes that the only factor that differentiates them is God's choice. The same holds true for the salvation of Gentiles, but Paul is focused on his own kinsmen in this context.
Isaac was chosen based on a promise made before his birth. Similarly, Jacob was chosen according to a prophetic word given to Rebecca, also before his birth. In this context, the Apostle emphasizes that the salvation of any individual is always God's decision and occurs before that person has the chance to do either good or bad.
A quick review of Romans chapter 9 will reveal that Paul never mentions spirituality at all. Thus I see no evidence supporting your contention that Paul is comparing physical seed with spiritual seed. Rather, the clear comparison is between "being chosen" and "not being chosen."
Some might argue that spirituality is the criterion by which God selects individuals. However, other writings explain that spirituality is actually a consequence of being chosen; it serves as evidence of having been chosen rather than a prerequisite for being chosen.
God marks those He has chosen by circumcising their hearts. In the early chapters of Deuteronomy, Moses urges his people to circumcise their hearts, although they fail to do so (Deuteronomy 10:16). Later, after Israel has experienced both blessings and curses, God promises to bring Israel back to the land and, at that time, He will circumcise their hearts Himself (Deuteronomy 30:6).
“Moreover the Lord your God will circumcise your heart and the heart of your descendants, to love the Lord your God with all your heart and with all your soul, so that you may live.
In this passage, we see the promise of eternal life. God assured the descendants of Jacob that He would circumcise their hearts so that they might live. Logically, if God is both able and willing to circumcise the hearts of Paul's kinsmen according to the flesh, then why hasn’t He done so yet? Furthermore, why doesn’t He do this for every person on Earth? We must remember that spirituality is not the criterion for salvation; rather, it is the result of salvation. God circumcises hearts so that a person may live, and he only circumcises the hearts of those whom he has chosen.
It is plainly obvious, Romans like every other New Testament book splits mankind into two diverse groupings – saved and lost. The believer is called a vessel of honour (or vessel of mercy) here, the unsaved is called a vessel of dishonour (or or vessel of wrath). This fits with everything Paul is pressing at in Romans. Race means nothing. Both Jew and Gentile have been brought into Christ, both Jew and Gentile are united in rebellion. These two spiritual groups can be found in every nation. After describing the wicked as being “fitted to destruction” (all of the wicked) Paul turns to the vessels of mercy, telling us that this company are those that God “had afore prepared unto glory.”
The distinction between a Jew and a Gentile in this context lies in God's prior relationship with the Jewish people. According to Moses, God promised the Jewish people that one day He would "circumcise" their hearts—meaning He would enable them to truly follow Him. While God also transforms the hearts of Gentiles, He did not make them a similar promise.
Romans chapters 9 - 11 explain how God will keep his promise to THEM.
The whole discourse here focuses in on identifying what is of God and what is not, especially in regard to Abraham’s descendants. The dividing factor comes down to: men are either “born after the flesh” or “born after the Spirit.” This has always been the case from the beginning.
Agreed, bearing in mind that being "born after the Spirit" is a miracle of God and a marker of his choice.
Race or physical birthright was never the determining feature when it came to blessing.
Did God make a covenant with David? Isn't Davidic lineage a condition of being King? God does work with families and family lines. Don't allow your physical/spiritual dichotomy obscure the facts of the case.
It was instead spiritual vitality. After all, both of these boys were biological children of Abraham. But the difference between them was that Isaac was a child of promise and Ishmael was not.
I agree as long as we are inserting spirituality into the mix.
The writer demonstrates how natural ancestry means nothing, even if your blood father was Abraham himself.
I disagree. Paul's argument begins with the premise that eternal life belongs to his kinsmen of the flesh. Thus, your conclusion that ancestry means nothing contradicts Paul's opening premise.