The Levitical Law, the Commandments and their relevance in the life of a Christian…
The Moral aspects of the Levitical Law and the Law of Conscience (Romans 2:15) will continue in perpetuity as the Law is necessary for the continuation/sustainability of the species and the Law is essential for Judgment in Eternity to manifest with equity and due process (Matthew 24:35).
The problem arises when men and women attempt to find righteousness (a right standing) with God the Father by keeping the Law in perfect obedience when no man or woman can be justified by Law because we’re encumbered with a sin-nature (Romans 3:23) and we cannot keep the righteous requirements of the Law in perfection; therefore, to fail in one jot or tittle of the Law is to fail in all the Law (James 2:10).
This is why Messiah fulfilled the Law for us in perfection (Matthew 5:17); it was Messiah’s perfect obedience to the Law that permitted Him to be the ONLY acceptable sacrifice for sin. We can attain, through the imputation, the perfection of Messiah’s righteousness when we believe with a sincere heart that He is God who died to pay our sin-debt and that He was resurrected from the dead for our justification (2 Corinthians 5:21; Romans 10:9-10).
Therefore, the Law plays an integral role in the life of a Christian as the Law demonstrates the righteousness of God while declaring our need for Jesus Christ as our Mediator for sin (John 14:6; John 3:36; 1 Timothy 2:5).