15 [I went on to say] Although we ourselves (you and I) are Jews by birth and not Gentile (heathen) sinners, 16 Yet we know that a man is justified or reckoned righteous and in right standing with God not by works of the Law, but [only] through faith and [absolute] reliance on and adherence to and trust in Jesus Christ (the Messiah, the Anointed One). [Therefore] even we [ourselves] have believed on Christ Jesus, in order to be justified by faith in Christ and not by works of the Law [for we cannot be justified by any observance of the ritual of the Law given by Moses], because by keeping legal rituals and by works no human being can ever be justified (declared righteous and put in right standing with God).
17 But if, in our desire and endeavor to be justified in Christ [to be declared righteous and put in right standing with God wholly and solely through Christ], we have shown ourselves sinners also and convicted of sin, does that make Christ a minister (a party and contributor) to our sin? Banish the thought! [Of course not!] 18 For if I [or any others who have taught that the observance of the Law of Moses is not essential to being justified by God should now by word or practice teach or intimate that it is essential to] build up again what I tore down, I prove myself a transgressor. 19 For I through the Law [under the operation of the curse of the Law] have [in Christ's death for me] myself died to the Law and all the Law's demands upon me, so that I may [henceforth] live to and for God. 20 I have been crucified with Christ [in Him I have shared His crucifixion]; it is no longer I who live, but Christ (the Messiah) lives in me; and the life I now live in the body I live by faith in (by adherence to and reliance on and complete trust in) the Son of God, Who loved me and gave Himself up for me. 21 [Therefore, I do not treat God's gracious gift as something of minor importance and defeat its very purpose]; I do not set aside and invalidate and frustrate and nullify the grace (unmerited favor) of God. For if justification (righteousness, acquittal from guilt) comes through [observing the ritual of] the Law, then Christ (the Messiah) died groundlessly and to no purpose and in vain. [His death was then wholly superfluous.]