What happens to faith if those who are of the law are the heirs?

Faith is made void and canceled when those who are of the law are counted as heirs. Heirship would then rest on law-keeping rather than the righteousness of faith, and the promise would not come through the law but through the righteousness of faith.

Les explains that if those who are of the law are heirs—meaning just the children of Israel through their law-keeping—then faith is made void and canceled. He notes that the law came 500 years after Abraham at Mount Sinai, was a severe burden and yoke of bondage Israel could not bear, and righteousness did not come through the law but through the righteousness of faith. He connects this to Galatians, where Judaizers tried to put Gentile believers under law, but the letter proves they were under grace. Using Isaac and Ishmael, Les shows Ishmael stood for law and flesh, while Isaac stood for grace and freedom; the bondwoman’s son cannot be heir with the son of the free woman.

Romans 4:14

For if they which are of the law be heirs, faith is made void, and the promise made of none effect:

If the people of the law are heirs, what happens to faith?

If those who are of the law are heirs, then faith is made void and cancelled. The law cannot be the basis of inheritance, because righteousness comes through faith. Law and faith are mutually exclusive in this regard; if law keeping makes one an heir, faith has no place.