Why don’t Christians follow all the laws of the Old Testament? Why do we think it’s OK to ignore all those prohibitions on eating shellfish and bacon, and wearing mixed fabrics, and so on? Are Christians hypocrites in doing so? I have heard that charge from skeptics before, so let’s work through that today.
I was listening to a theology class on my phone the other day, and the teacher stated that God made the old Mosaic covenant of the Law, with all of its sacrifices and rituals, as a temporary state of affairs. This made me think of how we as engineers sometimes have to plan for the lifecycle of a product. We typically design the product to resist certain loads, to survive in certain environments, and to have certain functions. But sometimes, we also have to design temporary structures or products where the end of the product life is also a significant part of the design, such as designing to facilitate deconstructing it at the end of its life. Think of something like temporary structures for large concerts where quick and easy disassembly of stages are a key part of the design. While many temporary structures for things like world expos have remained in use after the event they were built for (i.e. the Eiffel Tower), their purpose was to fill a role tied to a specific event; and when the event came and went, they either needed to be transitioned to a new purpose, or removed. This is exactly what we see in the Mosaic laws. Some, like prohibitions on murder, theft, etc, are moral laws that will remain in effect for as long as humanity endures. But other portions that were ceremonial or cultural had a planned life cycle with a replacement in mind from the beginning.
In the beginning, God created humans with basically only one rule to follow: “Don’t eat from this one tree, and I’ll count that obedience as righteousness. Break that rule, and die.” [Ge 2:16-17] They were under a “covenant of works” . But they did break that one simple rule, and spiritual death, or separation from God, was the result. The necessary consequence of sin (rebellion against God, or failing to meet His perfect standard) is separation from Him, or death. But God promised an eventual solution in the “fullness of time” [Ge 3:15, Mk 1:14-15, Ga 4:4-5, Tt 1:2-4, 1Ti 2:6], and in the meantime, made merciful allowances for humans, where He would accept animal sacrifices as substitutes for the guilty person. The animal sacrifices didn’t really do anything to cleanse us of those sins against God [He 10:4], but they were a constant reminder to us that the payment for sin is death [He 10:3], that in all fairness, it should be us paying that price, and also that God in His mercy had provided (and would provide) a substitute. He could’ve just left humans in that state of spiritual death until they died physically, at which point they would be eternally separated from God (i.e. in hell). He could’ve started over with new free-willed creatures each time the previous ones disobeyed. Or He could’ve made creatures without free will that would never disobey… but also never freely love. Instead, He chose to demonstrate His love and mercy in a way, and to a degree, that would not have been possible in those other scenarios; He extended grace – unmerited favor – to them and offered a way to be reconciled to Him, through the keeping of a prescribed set of laws, though the law was “only a shadow of the good things that are coming.” [He 10:1] But really, even from the beginning, it wasn’t the keeping of these laws that saved people – it was the trust in God’s promise of a future Messiah that resulted in the keeping of the Law. For no one born in sin could keep God’s law perfectly, so the law served not to save us, but to convict us and drive us toward Him who could save [Ro 3:20]. In fact, throughout the history of God’s interaction with man, He stated that He desired hearts that obeyed Him out of love rather than mere outward ritual [De 10:12, 1Sa 15:22, Mic 6:6-8 Pr 21:3, Ho 6:6]. But bringing that about would require a transition to a new phase of the lifecycle of redemption, where internal changes could be brought about, through the work of Christ and the Holy Spirit [He 8:10, Ezk 36:26-27, Ro 8:8-9].
And so, at the right time, God the Father sent God the Son to live a perfect life, fulfilling the covenant of works that Adam & Eve failed at, and then becoming the perfect sacrifice that really could cleanse our sins. If you read through the book of Hebrews, which compares Christ’s work to that of the old Law, there are two words that summarize that book: “better” and “completed”. Over and over again, the author of Hebrews makes the point that Christ’s work is better in every way than the Mosaic Law, and that Jesus completed, or finished, what was incomplete in the Law.
Lastly, there is still another phase to go. We are told of a future time when God will remake this world, and we will dwell in a “new heaven and a new earth”, and the dwelling of God will be with men [Re 21:3]. In the beginning, God walked in the Garden of Eden with Adam & Eve, until they broke fellowship with Him. Then we were told that when Jesus was born, He would be called Immanuel: “God with us” [Is 7:14, Mt 1:22-23]. And John tells us that “the Word became flesh, and dwelt among us” [Jn 1:14]. And after Jesus’ mission was complete, the Holy Spirit would dwell in believers permanently. But then when God’s plan of redemption is completed someday, He will dwell among a redeemed and glorified people forever. And so, through a long process (from our perspective), God will redeem His people, and restore what was marred in man’s initial rebellion. Thus God’s design lifecycle for His plan of redemption will be complete. But that first phase exemplified in the Old Testament law has already been completed in Christ, and there’s no going back to that once you’ve tasted of the goodness of that second phase of God’s plan. So no, Christians are not hypocrites for not following various ceremonial and cultural laws of the Old Testament, but rather we are simply following along with God’s phased plan of redemption.
 Dr. Gerry Breshears, audio lecture, as part of Biblical Training Institute’s “Academy” program.
 Wayne Grudem, Systematic Theology, Ch. 25: The Covenants Between God & Man”.