Yes, the law was always meant to be written in our minds and on our hearts. But the Fall separated us from God, and His voice became dimmer, more distant, with man becoming his own "god", so to speak, listening to his own voice, determining morality for himself, often based on selfishness, covetousness, with disastrous results. Augustine put it this way
"God wrote on tablets of stone that which man failed ro read in his heart."
what happened when the Son of GOD, Jesus gave the spirit on the cross? one important thing is as written "
the veil of the temple was torn in two from top to bottom;
Matthew 27:50-51
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50 And Jesus cried out again with a loud voice, and yielded up His spirit.
51 Then, behold, the veil of the temple was torn in two from top to bottom; and the earth quaked, and the rocks were split."
Mark 15:37-38
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37 And Jesus cried out with a loud voice, and breathed His last.
38 Then the veil of the temple was torn in two from top to bottom."
The veil in the temple separated the Holy Place from the Most Holy Place (the Holy of Holies), where God's presence dwelt. Only the High Priest could enter the Holy of Holies once a year, on the Day of Atonement, to offer the blood of a sacrifice for the sins of the people.
When Jesus died, the tearing of the veil from top to bottom symbolized the removal of the barrier between God and humanity. It indicated that through Jesus' death, the way to God was opened f
or all people, not just the high priest. Jesus' sacrifice made it possible for anyone to have direct access to God, without the need for a priset as mediator but through Jesus, we now have access always. This act signifies the end of the old covenant system of sacrifices and rituals and the beginning of a new covenant through Jesus' atoning work on the cross.
The new covenant, "in the fullness of time", is about man being reconciled with God, personally appropriated and realized and experienced as we turn to Him in faith which is to embrace and acknowledge Him as our God again. This is the right and just order of things. "I will be their God and they will be my people". That is to be connected to the Vine where His life-giving righteousness/justice may now begin to flow. This is a new righteousness, apart from the law but one that the law and the prophets nonetheless testify to (Rom 3:21), because the law is based on and reflects this righteousnsess even though it cannot produce it in us. Only God can do that, only God can "justify the ungodly". The law is merely the Letter at the end of the day, not the true motivating factor, itself, not the Spirit, not grace. So this is a righteousness based on faith and not the law (Phil 3:9) and the primary name of this righteousness is love, as only love can authentically fulfill the law (Rom 13:10). With love we can obey the law without even necessarily hearing it (Rom 2:13). That love is what Jesus shows us, calls us to, and makes possible for us,
with love yes you can be unknowingly obeying the lase six commandments that are related to loving one another BUT what about the first four commandments about loving GOD, this is where Paul's epistles are lacking at times.
"And hope does not put us to shame, because God’s love has been poured out into our hearts through the Holy Spirit, who has been given to us." Rom 5:5
The old covenant was not revoked, just made obsolete by a new and better covenant, one that can actually accomplish what the old could not.
the new covenant is the same ad the Old covenant ( jer 31:31-33) but put in the hearts and minds and flesh of those who believe in God's and Jesus words and obey him by doing GOD's will. if you think something else please provide the verses to make your point.