@PaulVargas Paul says that NOW righteousness is no longer by law (giving many reasons, proof that Christ ended the law giving superior covenant of grace) therefore law cannot give life anymore. If law could (still) give life, then that would still be acceptable; but evidently it is not so. Bengel Gnomon is perhaps the best commentary; he rightly interpret such sentences but his conclusion is Lutheran to see normative difference between law and grace covenant.
Apparently NPP scholars such as James Dunn too like Lutherans believe that law was never meant to justify. They have to ignore and misinterpret a lot of verses passages to maintain that. Moses writes about righteousness/justification by law. Rom10:5.
@PaulVargas Luther interpreted inspired from Augustin, that law could never justify. OT saints/Moses/prophets all justified by faith alone. Faith in hope of the messiah. (This implies that God deceived Israel by giving the law, saying this justifies them). Lutheran doctrine sees the law/commandments as a trick in which they should not have fallen.
@Dɑvïd Wow. Are that site/magazine and that author/meeting reputable sources? I don't know anything about any of them, although it appears that the meeting is happening now-ish in San Antonio, which probably means it's at least on the periphery of "important".