Now the practice of circumcision [i.e., the Jewish rite of identity, signifying the responsibility to observe the law of Moses] is worthwhile, providing you obey [the rest of] the law of Moses. But if you disobey the law, you might as well have never been circumcised.

Neither are all [Jewish] people children [of God], [simply] because they are Abraham's descendants. But [Gen. 21:12 says], "It is through Isaac that you [i.e., Abraham] will have descendants."

now if their fall be to the advancement of the world, and the few converts among them bring in whole numbers of the Gentiles: how much more so will it be, when the Jewish body recover?

[A summary of Jer. 31:31-34 says], "And I [i.e., God] will make this Agreement with them [i.e., Jewish and Gentile believers] when I take away their sins."

For they thought it was a good idea, and [besides] they were indebted to those Jewish Christians. For if the Gentiles [have] shared in the spiritual blessings of the Jews, [then] they owe it to those Jews to help meet their material needs.