I understand perfectly that the purpose of the law is to give the knowledge of sin (Romans 3:20) as a schoolmaster to lead men to Christ (Galatians 3:24) and thus is able to convert the soul (Psalms 19:7).
I would point out that those who are truly converted are delivered from sin / iniquity.
Mat 1:21, And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins.
Tit 2:11, For the grace of God that bringeth salvation hath appeared to all men,
Tit 2:12, Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
Tit 2:13, Looking for that blessed hope, and the glorious appearing of the great God and our Saviour Jesus Christ;
Tit 2:14, Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.
Tit 2:15, These things speak, and exhort, and rebuke with all authority. Let no man despise thee.
Since sin is the transgression of the law (1 John 3:4), the opposite of sin is obedience to the law.
And therefore, those who are born again will be obedient to the law.
Not to be justified, mind you; but rather because they have been justified solely through faith in the blood of Jesus Christ.
For it is written (Hebrews 13:12, Hebrews 10:29) that the blood of Jesus sanctifies.
And sanctification is definable as practical holiness and righteousness.
The righteousness of the law is fulfilled in those who walk not after the flesh but after the Spirit (Romans 8:4).