I believe God's law is holy but not all 613 commandments are applicable today. We should do as in Romans. Be in the spirit and let the Spirit guide us through the law. Anything else is applying our own righteousness and not the righteousness of God.
Actually, Paul is illustrating the need to leave behind those things that are past - in this case, the Law given that its Performance Based Acceptance Before God was meant to point out to man through his failure under the Law through the Law man's utter hopelessness for acceptance by God under the Law - Romans 7's "I had not known sin but by the Law" v. 7.
Paul is illustrating the need to leave that system behind "...for ye are NOT under the Law, BUT UNDER Grace," 6:14, that leaving that system of Performance Based acceptance, you move on to the Liberty (from the flesh) to serve ACCORDING TO AND UNDER GRACE via walking "AFTER the Spirit," Rom.8:1.
Fact is that "if ye be led OF THE SPIRIT, ye are NOT under the Law" Gal. 5:18.
"For ye have NOT the spirit OF BONDAGE AGAIN to fear; BUT ye HAVE RECEIVED the Spirit OF ADOPTION, whereby ye cry, Abba," (in other words) "Father." Rom. 8:15.
The Spirit would never lead the Believer to put him or her self back under that yoke of bondage the Law had been as the Law's means of making one's bondage obvious by setting it off in him or her through its system of Thou Shalt/Thou Shalt Not.
The Law is Performance Based Acceptance - calls for righteousness from the person wanting righteousness. Problem: The Law is not able to give that acceptance in that it is unable to empower one, in that It is weak through the flesh.
God set this up that way so that when the Savior showed up, man could know from centuries of failure under the Law that man is utterly helpless to meet the Law's demand and thus utterly hopeless of ever receiving the Law's promise of righteousness based on performance.
Fact is that "IF righteousness is by the Law, THEN CHRIST IS DEAD IN VAIN" Gal. 2:21.
In short, God makes the Believer "the righteousness of God in Him" (in His Son) 2 Cor. 5:21, that (purpose or intent) the Believer THEN be able to walk in righteousness because that is who he or she now is.
He has made the Believer the righteousness, or perfect standard of acceptance before God, that the Law promised would be given "to them who by patient CONTINUANCE in well doing SEEK FOR glory and honour and immortality" Rom.2:7.
He has made the Believer the righteousness of God in Christ.
The Believer HAS righteousness - IN Him.
The job is yours, no experience needed, no years toiling away needed first, for the qualifier is built in, because the Qualifier has FULLY met the standard in your stead - you - CAN NOT - be - fired - now just go and be who you are in Christ.
And when you screw up, that just shows why the Son ALONE deserved and deserves ALL the glory. Look at the screw up for what it is, focus on its fact as proof the Cross was needed, and allow that - the Cross - to motivate your faith by Its great love wherewith He loved you. Loved you such that He gave Himself for you, Gal. 2:20. Look at it in this way, and deal with in this way - get back to walking in Him.
In short...
"What shall we say THEN? Shall we continue in sin, that grace may abound? GOD FORBID. How shall we, that are dead to sin, live any longer there in?" Rom. 6:1,2.
