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.]