This is a tough discussion seeing the christian world does not understand the Mosaic Law, Grace and how the Law relates to the new testament believer. I would ask after reading this that you research the scriptures, read Romans written to a mixture of gentile and Jewish believers, Galatians written to gentiles who never were under the Law, and Hebrews written to Jewish believers who converted to Christianity and were trying to be drawn back into the Law by Judiazers.
I tim 1: 7-11, Gal 2: 15-16, 19-21, 3:10-13, 19, 24-25, 5:1-6, Romans 9: 30, 10: 1-4, 11:5-6, Hebrews 7: 18-22, Hebrews 8: 6-13, Hebrews 9: 15.
The Mosaic Law is the only covenant written to man with conditions. If you wanted to be blessed under the Law you had to keep all the Law. The Law was a tutor until the teacher came. Prior to the Law God blessed man based on the Abrahamic Covenant. He came to Abraham and presented a covenant that all you had to do was believe. The Law required to be justified before God you had to keep the law. If you did not curses came on you. If a believer today tries to live his life under Mosaic Law according to Galatians he puts himself under a curse. You have to keep it all, not part but all. Justification today comes by beleiveing on the finished work of Christ. When you do, the law is then written on your mind and heart. You are to live out of your heart, not by rules and regulations set forth by the Law. See Romans 14 and I Corth chapter 8.
We put people under extreme bondage by making them live by the law. We seek to be justified by works not faith in what Christ. We present our good works of the Law to God and expect to be blessed! God only is pleased by faith. Faith in his free gift of salvation and trusting that you are pleasing to him by your faith not your works.
Now works are important, but they never are to be confused with doing them to please God. The law was written for the Jewish race to follow until the promise of Christ could come so ALL men could receive the free gift of Christ. Your good works should come out of a heart that loves God, not trying to please God. Yes, we can learn from the Law, but never to be justified in the sight of God. I corth 15:56 states that the strength of sin is the LAW. All the law does is reveal what sin is, which then should make you turn to Christ for help.
This is a very limited teaching of Law and Grace, but if you are living your life by trying to please God by works of the Mosaic Law you will be very miserable. The only one who kept the Law was Christ. He fulfilled it for you, went to the cross, died, bore the curse of the Law, rose again for your justification. So why would you want to live under something that is obsolete? The only use the Law has today is to reveal sin which should drive you to Christ. Your justified by Christ, not your works of the Law. People say they live by the Law, but I never see them bringing the animal sacrifices to the temple in order to be justified and have their sins covered for a year. In fact, the whole priest hood has been done away with because you are now Kings and Priest before God. You can come to him yourself, not through a mediator at the temple.
Its Christ plus nothing. Its all him and what he did and that is where you can put your trust! God loves you, accepts you and wants you to live out of your spirit, not the letter of the Law.