Galatians 2:16: The end of this verse refers to Ps. 142.2.
"We who know that a person is not justified by works of the law but through faith in Jesus Christ, even we have believed in Christ Jesus that we may be justified by faith in Christ and not by works of the law, because by works of the law no one will be justified. For through the law I died to the law, that I might live for God. I have been crucified with Christ; yet I live, no longer I, but Christ lives in me; insofar as I now live in the flesh, I live by faith in the Son of God who has loved me and given himself up for me. I do not nullify the grace of God; for if justification comes through the law,then Christ died for nothing."
* [2:15–21] Following on the series of incidents cited above, Paul’s argument, whether spoken to Cephas at Antioch or only now articulated, is pertinent to the Galatian situation, where believers were having themselves circumcised (Gal 6:12–13) and obeying other aspects of Jewish law (Gal 4:9–10; 5:1–4). He insists that salvation is by faith in Christ, not by works of the law. His teaching on the gospel concerns justification by faith (Gal 2:16) in relation to sin (Gal 2:17), law (Gal 2:19), life in Christ (Gal 2:19–20), and grace (Gal 2:21).* [2:17] : literally, “a servant of sin” (cf. Rom 15:8), an agent of sin, one who promotes it. This is possibly a claim by opponents that justification on the basis of faith in Christ makes Christ an abettor of sin when Christians . Paul denies the conclusion (cf. Rom 6:1–4).* [2:18] To return to observance of the law as the means to salvation would entangle one not only in inevitable transgressions of it but also in the admission that it was wrong to have abandoned the law in the first place.* [2:19] : this is variously explained: the law revealed sin (Rom 7:7–9) and led to death and then to belief in Christ; or, the law itself brought the insight that law cannot justify (Gal 2:16; Ps 143:2); or, the “law of Christ” (Gal 6:2) led to abandoning the Mosaic law; or, the law put Christ to death (cf. Gal 3:13) and so provided a way to our salvation, through baptism into Christ, through which we die ( ; see Rom 6:6). Cf. also Gal 3:19–25 on the role of the law in reference to salvation.