Thomas R. Schreiner

“Justification is by faith alone, but it isn’t a faith that is alone, for true faith produces good works. Still, good works are not the ground or cause of salvation; they are the fruit of one’s faith. The perfect righteousness of Christ is imputed to believers, so that their righteousness is not inherent but is theirs because they are united to Jesus Christ.76 At the final judgment God will declare publicly what was already the case in the lives of believers, i.e., that they are righteous by faith, and their works will verify (but will not be the foundation of) that declaration.”
― Thomas R. Schreiner, Faith Alone---The Doctrine of Justification: What the Reformers Taught...and Why It Still Matters

“The problem with the Judaizers is that they wanted to turn the clock back in salvation history. But their fault was not merely chronological. It is not as if their only problem was that they didn’t know what time it is. The era of the law is one of slavery to sin. Freedom and life only come through Christ and the Jerusalem above. Those who are part of the old era are dominated by the flesh instead of the Spirit. Hence, Paul’s problem with Judaism was not, contrary to Sanders, merely that it is not Christianity. Returning to the law is fatal for Paul because it lands one under the dominion of sin, so that one is subjugated to its tyranny.”
― Thomas R. Schreiner, Galatians