I am amazed at the ways some people will seek to put us under the Old Covenant. It is akin to finding reasons for going to jail, or going to a monastery. It is bondage. God says:
Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage. (Galatians 5:1)
This is a command to not go back to the Old Testament Law. God had just said:
Tell me, ye that desire to be under the law, do ye not hear the law? For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise. Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar. For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children. But Jerusalem which is above is free, which is the mother of us all. For it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath an husband. Now we, brethren, as Isaac was, are the children of promise. But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now. Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman. So then, brethren, we are not children of the bondwoman, but of the free.
We are free from the Law. We must stand fast in that liberty and not go back to the Old Covenant and attempt to resurrect it. It is not optional. We are commanded: “Be not entangled with the yoke of bondage.”
Jesus gave us commands to keep, and gave us more through His secretaries. He did not want us to go back to the Old Law, or He would not have needed to give us new commands. There were already commands about doing good to your enemy (Prov. 25:21-22), loving your neighbor as yourself, etc. Jesus came and set up a new system that was not part of the Law. Through Him we die to the Law. We must walk in newness of life. Walk in the Spirit!