Romans 2:14 For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves: 15 Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another.
[Patriarchs & Prophets pp 372] The same law that was engraved upon the tables of stone is written by the Holy Spirit upon the tables of the heart. Instead of going about to establish our own righteousness we accept the righteousness of Christ. His blood atones for our sins. His obedience is accepted for us. Then the heart renewed by the Holy Spirit will bring forth “the fruits of the Spirit.” Through the grace of Christ we shall live in obedience to the law of God written upon our hearts. Having the Spirit of Christ, we shall walk even as He walked.
Through the prophet He declared of Himself, “I delight to do Thy will, O My God: yea, Thy law is within My heart.” Psalm 40:8. And when among men He said, “The Father hath not left Me alone; for I do always those things that please Him.” John 8:29. The apostle Paul clearly presents the relation between faith and the law under the new covenant. He says: “Being justified by faith, we have peace with God through our Lord Jesus Christ.” “Do we then make void the law through faith? God forbid: yea, we establish the law.”
“For what the law could not do, in that it was weak through the flesh”—it could not justify man, because in his sinful nature he could not keep the law—“God sending His own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh: that the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.” Romans 5:1; 3:31; 8:3, 4.
Romans 8:3 For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh: 4 That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.
May God add His blessing to the study of His word. “Good night” and God bless!