Jer 31:33 But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.
This passage refers to the whole house of Israel which includes all believers in Christ. Those that truly embrace the words of the Lord Jesus are most definitely not under the Old Testament law. Those filled with the Holy Spirit are the Elect, chosen unto Christ. The promise of eternal life which is incorruption and immortality is the hope of the Spirit filled believer and is our assurance of Salvation.
Isa 51:4 Hearken unto me, my people; and give ear unto me, O my nation: for a law shall proceed from me, and I will make my judgment to rest for a light of the people.
Isa 51:6 Lift up your eyes to the heavens, and look upon the earth beneath: for the heavens shall vanish away like smoke, and the earth shall wax old like a garment, and they that dwell therein shall die in like manner: but my salvation shall be for ever, and my righteousness shall not be abolished.
Isa 51:7 Hearken unto me, ye that know righteousness, the people in whose heart is my law; fear ye not the reproach of men, neither be ye afraid of their revilings.
Isaiah is referring to the followers of Jesus, who is God manifest in the flesh. It is and will always be Christ Jesus that men despise. Those who are void of the truth that only comes through Christ, serve their father the devil, and share in his hatred of the Lamb of God that takes away the sins of the world.
Isaiah’s prophesy is of a people that would know the new law of Christ; this law would be written in their hearts. Those who follow the New Testament law of Jesus are not under the Old Testament law, and they will receive redemption at the second coming of Jesus.
Isa 51:11 Therefore the redeemed of the LORD shall return, and come with singing unto Zion; and everlasting joy [shall be] upon their head: they shall obtain gladness and joy; and sorrow and mourning shall flee away.
Jesus (Yahshua) the Lord God of Israel, is the one who will redeem the true Israel of God (Luke 1:68, 24:21).
Isaiah is speaking of the second gathering of the true Israel of God, a future prophecy that has yet to occur.
James 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.
Christ also came to redeem those that were under the law, that they also might receive the adoption of sons (Gal 4:5, John 1:17, Rom 3:20).
We are not under the old testament law of bondage, but the law of liberty which is in Jesus Christ our Messiah. The covenant of Christ was established upon better promises (Heb 8:6).
James 2:8 If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well.
When we bear one another’s burdens, we fulfill the law of Christ (Gal 6:2).
Six of the commandments under the old law were unto doing no harm to others. The commandment of Loving others is much greater than these.
The second commandment of the new the law of Christ is fulfilled in this; thou shalt love thy neighbor as thyself (Gal 5:14). This was not realized by most under the Old Testament law, as it was spiritually discerned.
Gal 5:4 Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.
We are not under the Old Testament law, but the law of Christ’s grace. To claim to be under the Old Testament law when we have access to the new law of Christ, is self righteousness unto death.
Gal 5:6 For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.
Those of the religions of judaism and christianity, who claim to be under the Old Testament law do not have a personal relationship with the creator Christ the King.
To claim righteousness by attempting to follow the works of the law without faith was and still is dead works.
Gal 5:18 But if ye be led of the Spirit, ye are not under the law.
We need to be led by the spirit of truth, which declares that we are not under the Old Testament law of bondage, but the law of Christ wherein we can have liberty.
Gal 6:15 For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creature.
under the Old Testament law link to entire article and the Law series