In Romans 8, Paul caps his extended argument that God’s plan in Christ also includes those who were not of the physical nation of Israel. To the nation of Israel the Lord gave the Law, but many of those of that physical nation thought the Law was the nation’s and the world’s salvation in the Messianic era (illustrated in the quote below). Paul said this was not so because the Law was given to show man’s bondage to sin. On the other hand, those who walk by the Spirit’s teachings have been made free “from the law of sin and death” (8:2). The contrast between the two ways is this: to walk in accordance with the flesh (i.e., the Law) is to be carnally (fleshly) minded. To be fleshly minded (i.e., to walk in accordance with the Law) is to fail to please God. Why? Because, the Law (Law of Moses) has been fulfilled, completed. Since this is the case, Paul said, the afflictions one experiences because of loyalty to God in His New Covenant is well worth the gift given to the afflicted one. The experiences felt may not be easy, but to the Christian, those experiences can’t separate one from the promises given. Who can separate a person from the love and salvation of Christ? There is no outside power that can do so (8:31-39). If, however, there is an inside doubt, with an ultimate turning away from the Lord, it is certain that one powerful outside source will address it, and address it only as the Lord can (Galatians 5:1-4; cf. Hebrews 3:12-15)! Thus, nothing outside of self can adversely affect our salvation.
“Consequently, the natural human tendency will be to choose correct and virtuous actions, in contrast to pre-Messianic times in which the natural inclination is for evil. Jeremiah reiterates this point here by stating that God will seal a new covenant with the nation, free from evil and sin” (Rabbinic Milstein Edition Commentary on Jeremiah, p. 275). What is this new covenant the rabbis believe and teach? “God will engrave the existing Torah upon the hearts of the Jewish nation” (ibid).