And Deut 30 tell us what is written.
James talks of this also in his Epistle.
We are begotten by the word of truth. We are new creation having the engrafted word. So be a doer of this word and not a hearer only. Do not forget what manner of man we now are as we look into the mirror and see this perfect law of liberty.
We are now not subject to the law as in do's and don'ts. We are of God having the engrafted word, so it is now woulds and won'ts.
So speak ye and so do, as we will be judged by the law of liberty we are now.
Jas 1:18 Of his own will begat he us with the word of truth, that we should be a kind of firstfruits of his creatures.
Jas 1:19 Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Jas 1:20 For the wrath of man worketh not the righteousness of God.
Jas 1:21 Wherefore lay apart all filthiness and superfluity of naughtiness, and receive with meekness the engrafted word, which is able to save your souls.
Jas 1:22 But be ye doers of the word, and not hearers only, deceiving your own selves.
Jas 1:23 For if any be a hearer of the word, and not a doer, he is like unto a man beholding his natural face in a glass:
Jas 1:24 For he beholdeth himself, and goeth his way, and straightway forgetteth what manner of man he was.
Jas 1:25 But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.
Jas 1:26 If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.
Jas 1:27 Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.
Jas 2:8 If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:
Jas 2:9 But if ye have respect to persons, ye commit sin, and are convinced of the law as transgressors.
Jas 2:10 For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.
Jas 2:11 For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law.
Jas 2:12 So speak ye, and so do, as they that shall be judged by the law of liberty.