I have not taken part in the discussions we have been having on role of law in New Covenant(NC). But read few, I see lot of confusion on this subject in this forum. I want to tell my view on this.
To understand the role of Law in NC, we need to understand what is sin in NC. The sin under OC was anything that is against law. Hence it is very important for them to hold the law and look everything through the eyes of law so that they know what is Sin.
Even in new Covenant we still define sin as lawlessness -
Everyone who practices sin also practices lawlessness; and sin is lawlessness (1 John 3:4).
But new covenant bar has been set higher than the bar of Law set in Old Covenant.
You can imagine a long jump bars like you see in atheletics. One bar at say 5 feet height called standard of OC law and another bar at say 10 at feet height saying NC life. Now anyone who fails to jump the 5 feet bar (OC Law) has definitely failed to jump 10 feet bar that is NC life standard. That is what the meaning of 1 John 3:4 is, if we live as lawless person we have definitely fallen bellow the standard of NC.
A person who lived absolutely following all laws of OC can still fail to enter NC life. It is like a person who jumped crossing the 5 feet bar, but he is still bellow the standard of 10 feet bar set by NC. That is why Jesus said that the greatest man who lived under OC (John the Baptist) is not greater than the least in the NC.
Now then what is this 10 feet high bar set by NC? It is the life of Jesus.
Romans 3:24:- for all have sinned and fall short of the glory of God.
So anything that falls short of the Glory of God is a sin. This glory of God is the 10 feet high bar set by NC. Now in OC no one knew the glory of God hence God has to give laws to show them what is his glory. But now we know that what is his complete Glory is.
2 Cor 4:6:- For God, who said "Let light shine out of darkness,” made His light shine in our hearts to give us the light of the knowledge of the glory of God in the face of Jesus Christ.
So the knowledge of Glory of God was not given in OC, but to us in NC, he has shown this glory in through Jesus. By sending Jesus to earth and live out God's standard to us.
So for a Christian, the standard of life that Jesus lived on this earth is the standard that he has to live. The entire standard of Jesus's life is not written plainly in Gospel. Many things are actually hidden. For example how Jesus used money is hidden in the Gospel. Only the Holy Spirit can show us this hidden Gem based on the need of our heart.
Jesus said the Holy Spirit will take things of him and show it to us. So the Holy Spirit whom we receive when we are born again will show us how Jesus lived in each and every situation. This will now guide us as we live on this earth.
John 1-4:- In him was life and the life was light to all men.
In old Covenant, only God's word (laws) are the light for men to walk. In NC, it is the life of Jesus revealed from God's word by the Holy Spirit is the light to believers. We no longer live by written word alone, but the Spirit behind the word that was lived by Jesus and now will be revealed to us by Holy Spirit.
Now when I read the OC with NC spirit, the Holy Spirit shows me the spirit behind those laws. This exactly what Jesus spoke to the disciples on the way to Emmas in Luke 24. He showed them from OC the spirit of Jesus's life. And their hearts burned when they heard him speak.
So in NC, any act that Jesus will not do is a Sin to us. It might be perfectly acceptable under OC, but not under NC. For example even a simple though of un-forgiveness is a sin to me because Jesus forgave people even before they hurt him (anything said against the son of God is already forgiven!).
