This was the same mistake the Scribes and Pharisees made according to the very Words of Jesus in John 5:39.
God's law is His instructions for how to testy about his nature and how to thereby experientially come to know Him, or in other words grow in a relationship with Him. In Jeremiah 9:3 and 9:6, they did not experientially know God and refuse to know Him, because in 9:13, they had forsaken the Mosaic Law, while in Jeremiah 9:24, those who experientially know God know that he delights in practicing steadfast love, justice, and righteousness in all of the earth, so delighting in expressing those and other aspects of God's nature is the way to grow in a relationship with God. In Romans 6:23, eternal life in Christ is the gift of God, in John 6:40, those who believe in Jesus will haver eternal life, in John 17:3, eternal life is knowing God and Jesus, and in Matthew 19:17, the way to enter eternal life is by obeying God's commandments, so obedience to God's commandments is itself part of the content of God's gift and what it looks like to believe in Jesus and to grow in a relationship with him. In 1 John 2:4, those who say that they know Jesus, but don't obey His commandments are liars and the truth is not in them, and in 1 John 3:4, sin is the transgression of God's law, and those who continue to practice sin have neither seen nor known him. In Matthew 7:23, Jesus said that he would tell those who are workers of lawlessness to depart from him because he never knew them, so the goal of the law is to teach us how to express God's nature and how to thereby grow in a relationship with Christ, who is the exact expression of God's nature (Hebrews 1:3)
However, people can obey the law while missing the goal of the law, such as in John 5:39-40. Jesus said that they searched the Scripture because they think that in it they will find eternal life, and they testify about him, yet they refuse to come to him that they might have life. In Matthew 19:17, the way to enter eternal life is by obeying God's commandments, so eternal life can be found in the Scriptures and the Pharisees were correct to search for it there, but they needed to realize that a relationship with Christ is the goal of the law and come to him for eternal life. In Romans 9:30-10:4, the Israelites had a zeal for God, but it was not based on knowledge because they didn't understand that a relationship with Jesus is the goal of the law for righteousness for everyone who has faith. So they failed to attain righteousness because they pursued the law as though righteousness were by works in an effort to establish their own instead of pursuing the law as though righteousness were by faith in Christ. In Matthew 23:23, Jesus said that tithing was something that they ought to be doing while not neglecting weightier matters of the law of justice, mercy, and faithfulness, so expressing the weightier matters is how we reach the goal of the law of knowing Christ. In Philippians 3:8, Paul had been in the same boat where he was keeping the law, but without having a focus on knowing Christ, so he had been missing the whole goal of the law and counted it all as rubbish.
So the problem in John 5:39-40 was not that they were still keeping laws that foreshadow and testify of Christ, but rather they were neglecting the weightier matters of the law that foreshadowed and testified of Christ.
It is time to leave the shadows dear friend. We are in the new covenant now not the old.
I have never once stated that we are not under the New Covenant or that we are under the Mosaic Covenant, but rather I have been speaking about how we should live under the New Covenant.
You did not address anything in the post you are responding to and the scriptures that disagree with you accept to provide old covenant scripture to try and support the practice of the "shadow law" for remission of sins, that have been fulfilled in Jesus as the Savior of the World. You know as well as I do dear friend that I am talking about the "shadow laws" for remission of sin right?
Yes, I am speaking about the laws that foreshadow and testify about Christ.
"To fulfill the law" means "to cause God's will as made known in His law to be obeyed as it should be” (NAS Greek Lexicon pleroo 2c3). After Jesus said he came to fulfill the law in Matthew 5, he proceeded to fulfill it six times throughout the rest of the chapter by teaching how to correctly obey it or by completing our understanding of it. In Galatians 5:14, loving our neighbor fulfills the entire law, so it refers to something that countless people have done, not to something unique that only Jesus did. In Galatians 6:2, bearing one another's burdens fulfills the Law of Christ, so you should interpret that in the same way as you interpret fulfilling the Law of Moses. There is nothing about Jesus fulfilling the Mosaic Law that makes any of it no longer applicable, but rather he fulfilled it so that we would have an example to follow, and as his followers we are told to follow his example (1 Peter 2:21-22), and that those who are in Christ are obligated to walk in the same way he walked (1 John 2:6), which notably don't make exceptions for laws that foreshadow Christ. On the contrary, the light of Christ brings full substance to the foreshadows so that we can fully see what they were teaching us about Christ, which makes them all the more important to continue to observe in remembrance of Christ, such as in 1 Corinthian 5:6-8.
My last post quoted what I hate replied to, but it appears that you've heavily edited your post since then, which would explain why there were parts that I did not see until now that I have not replied to.