A.T. Robertson Commentary Romans 3:31

"Do we then make the law of none effect through faith? God forbid: nay, we establish the law." — Romans 3:31 (ASV)

Nay, we establish the law (αλλα νομον ιστανομεν). Present indicative active of late verb ιστανω from ιστημ. This Paul hinted at in verse 21. How he will show in chapter 4 how Abraham himself is an example of faith and in his life illustrates the very point just made. Besides, apart from Christ and the help of the Holy Spirit no one can keep God's law. The Mosaic law is only workable by faith in Christ.