Paul's point in Romans 4 was Abraham didn't live under the law of works(Mosaic Law)--but under the gospel of grace.
Well, you're simply wrong.
Romans 4:1-8 makes absolutely NO mention of "law", but is speak of "works" in GENERAL. You have to CHANGE it to make it about "the law", to try to twist Scriptures tot fit your Mormonism.
I will simply remind you that Paul had just finished explaining to us in Rom. 3:19-20 that NOBODY can keep the "Law of Moses".
Now you would have us believe that God switched out the Mosaic Law for some OTHER set of "works" that are required for salvation. Not only is that NOWHERE found in the text, but it poses a problem:
1) Is this new "set of works" more STRINGENT than the Mosaic Law? If nobody can obey the Mosaic Law, then we have absolutely NO hope of obeying a "higher" law.
2) Is this new "set of works" LESS difficult than the Mosaic Law? If so, does that mean that your God has "dumbed down" and God's Holiness will accept something less than perfect?
Further, Paul writes in Eph 2:
Eph. 2:8 For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,
9 not a result of works, so that no one may boast.
Are "works of the law" the only works that man can "boast" for doing?
Of course not. ANY works that we do, is a cause of "boasting".
So according to Paul, the "works" that he excludes from being salvific is NOT limited to the Mosaic Law.
And even closer to the context of Rom. 4:6 is the following:
Rom. 4:2 For if Abraham was
justified by works, he has something to boast about, but not before God.
3 For what does the Scripture say? “Abraham believed God, and it was counted to him as righteousness.”
4 Now
to the one who works, his wages are not counted as a gift but as his due.
Clearly Paul is condemning (as salvific) works in GENERAL, not merely the "works of the Law".
So you are clearly wrong.
Paul differentiated between works(rituals of the Mosaic Law) and obedience to the gospel:
1 Corinthians 7:19---King James Version
19 Circumcision is nothing, and uncircumcision is nothing, but the keeping of the commandments of God.
Um, I hate to break this to you, but "the commandments of God" is a reference to THE MOSAIC LAW.