I know you don't know what I mean! Many people don't because they don't listen to all scripture, and also they don't realize all scripture is breathed by the same God, and eternal God who does not change. I despair of many ever understanding.
If you were under the law, then you would have to obey all law to be saved. You can't do that. Christ came to take you out of that situation, Christ offered you forgiveness through Him, so you aren't under law for salvation but under Christ. That does not put you outside of God's way for you, but it means you are even more inside of that path the law lays out for you, in that way you are still under the law. Not for salvation, that is taken care of. But under love. Christ put it this way "If you love me you will keep my commandments". The law expresses what God says about love and the expression of love. The law is all, every bit, of what the beautiful 119th Psalm says. Christ explained law for us in the Sermon on the Mount.
The Jews made a mitzvah that all gentiles were to do all the things scripture had told them to as a reminder of a spiritual law, although the physical that they were told to do was not the goal, the spiritual law was what God saw. Jews said that unless the gentiles obeyed each physical law they could not be admitted to the church. Many of the letters address this. The spiritual law behind the rituals still stands. People use this to say that all of God's spiritual laws are no more. It is true that the spiritual law is what God sees, but you can't tell lies about someone and still obey the spiritual law to love, for instance. When it is pounded into people that the law is dead, then the church sets no boundaries on behavior, but Christ does set boundaries on behavior. It is a teaching leading to death. If you look at the actions today of many people in our churches you will see that it is bringing disaster to us.