But can anything else be said about the potential difference between the obligating content of “the Law of spirit and life” and “the Law of sin and death” (8:2)? Though requiring a longer treatment in its own right, it is important to recognize that given the Law’s incapacity to resurrect (Gal 3:21), and given Paul’s conviction that human bodies will become immortal in the resurrection (1 Cor 15:42–53), it may be that some of the Law’s commandments cease to function then (in the resurrection) as they do now. The difference between the ages, their respective bodies, and the commandments, though, lies not in the insignificance of the Law in Paul’s thought, but due to the supposition that the Law given to Israel regulates mortal bodies subject to impurity and death.

However, once resurrected and immortal, humans will possess bodies no longer subject to decay and impurity, and as such, laws that regulate such impurity will cease to be of significance. Without death and dying, purity regulations cease to be needed. Thus, it is not “the impurity laws” themselves that cease, but impurity. This kind of legal reasoning is evident in Luke 20, wherein the Sadducees present Jesus with the scenario of one woman having married several brothers before asking, “In the resurrection, therefore, whose wife will she be?” (Luke 20:33). Jesus’s response is telling: “The sons of this age marry and are given in marriage, but those who are considered worthy to attain to that age and the resurrection from the dead, neither marry, nor are given in marriage, for neither can they die anymore, for they are like angels, and are sons of God, being sons of the resurrection” (Luke 20:34–36). The change in the material quality of the resurrection body impacts a law that legislates marriage not because the “law” is insignificant but because it legislates a condition (mortal bodies that must procreate, the context of which is marriage in Jesus’s setting) that no longer obtains in the resurrection given the deathlessness of the bodies of that age. - Paul T. Sloan, Jewish Law-Observance in Paul