From Shadow to Substance: The Peril of Returning to the Old Covenant

To return to the Old Covenant—to live according to its written code, its dietary restrictions, its Sabbaths, and its structural legalism—is not merely a change in religious preference; it is a fundamental misunderstanding of the finished work of Christ. As the Apostle Paul warned the Galatians, to seek justification or sanctification through the Law is to sever oneself from Christ and fall from grace (Galatians 5:4). The Old Testament was designed as a shadow (skia) of the good things to come, but the reality—the body (sōma)—belongs to Christ (Colossians 2:17). Now that the reality has arrived, clinging to the shadow is a rejection of the substance.

The Ministry of Righteousness vs. The Ministry of Death

The distinction between the two covenants is stark. The Old Covenant, described by Paul as a "ministry of death" carved in letters on stone, had a fading glory. The New Covenant is the "ministry of the Spirit" and the "ministry of righteousness" (2 Corinthians 3:7-9).

Under the Law, righteousness was a demand placed upon man: "Do this and live." It was a conditional contract based on human performance, which ultimately failed because of the weakness of the flesh (Romans 8:3). The New Covenant is "better" (Hebrews 7:22) because it does not depend on the performance of the people, but on the performance of the Mediator, Jesus, who cannot fail. In the Greek Interlinear, the word for "fulfilled" often carries the weight of "completed" or "filled to the brim" (pleroo). Jesus did not come to merely update the Law; He came to be the termination (telos) of the Law for righteousness to everyone who believes (Romans 10:4).

Therefore, righteousness is no longer a wage earned by works of the Law, but a gift imputed by grace. As Paul writes, "For sin shall not be master over you, for you are not under law but under grace" (Romans 6:14). To go back to the Law is to go back to the mastery of sin, for "the power of sin is the law" (1 Corinthians 15:56).

A Spiritual Kingdom: Beyond Lineage and Nation

A critical error in returning to the Old Covenant is the attempt to make the Kingdom of God an earthly, nationalistic reality, rather than a spiritual one. It neglects the scriptures in regards to the promise given to Abraham beforehand, which the gospel rests on. To define the Kingdom by one nation or people group is to neglect the reality in Christ, sever from him as Paul calls it, and to fall from the gospel of grace in the new covenant. 

One New Man: The promise to Abraham was that all nations would be blessed through him, not merely a single ethnic line. Paul reveals the mystery of this in Ephesians 2:14-15, stating that Christ "has made the two groups one and has destroyed the barrier, the dividing wall of hostility." By setting aside in His flesh the law with its commands and regulations, His purpose was to create in himself "one new man" (kainos anthropos) out of the two, thus making peace. To return to the Old Covenant is to rebuild the wall of separation that Christ died to tear down. 

Spiritual Lineage: Access to this Kingdom is not genetic. As John 1:12-13 declares, the authority to become children of God is given to those who believe in His name—children born not of natural descent (aimaton - bloods), nor of human decision or a husband's will, but born of God. The physical lineage of the Old Testament was a placeholder for the spiritual regeneration of the New. As Paul argues in Romans 2:28-29, "A man is not a Jew if he is only one outwardly... No, a man is a Jew if he is one inwardly; and circumcision is circumcision of the heart, by the Spirit."

The new covenant establishes a spiritual kingdom of the heavenly reality. No longer based on human effort or lineage. Jesus said one must enter the kingdom of heaven through a new birth of the Spirit (John 3). 

The "Yes" and "Amen": We do not need the Old Covenant to access God's favor or future. Paul writes in 2 Corinthians 1:20, "For no matter how many promises God has made, they are 'Yes' in Christ. And so through him the 'Amen' is spoken by us to the glory of God." Jesus is the exclusive way to the Father (John 14:6); adding the Old Covenant to Him implies that He is insufficient. There is not another way to the Father that bypasses Jesus, this is unbelief, darkness, and sin.

Shadows of the Kingdom: Food, Drink, and Days

The believer must recognize that the rituals of the Old Testament were "elemental principles of the world" (stoicheia)—rudimentary teachings destined to perish with use (Colossians 2:20-22).

Dietary Laws: The Kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit (Romans 14:17). While dietary laws and fleshly circumcision may offer physical benefits, God is concerned with the inward man. The external washing of cups and observance of clean foods were shadows of the internal cleansing provided by the blood of Christ.

The Sabbath: The physical Sabbath was a shadow of a spiritual reality. In Hebrews 4, the scripture speaks of a Sabbath rest (sabbatismos) that remains for the people of God. This is not a day of the week, but a state of existence in Christ. The Israelites failed to enter God’s rest because of unbelief, despite keeping the weekly Sabbath. Today, we enter that rest by ceasing from our own works of self-righteousness and justification. Jesus declared Himself Lord of the Sabbath; to enforce a day is to miss the Person who is our Rest.

Tithing and Sacrifices: In the Old Covenant, the tithe was a shadowy representation where the holy portion was brought to the storehouse for the Levitical priesthood. What was placed on the altar became holy and the priest partook and participated in holiness for service in the temple, to become before a Holy God. Today, Jesus is the reality of that provision. 

We do not tithe to maintain a shadow temple; we are the temple of the Holy Spirit. We partake and have Communion with Christ, the Living Bread. We partake of his holiness thus can boldly approach the throne of grace of a holy God. Jesus gave His flesh and blood so we participate in his godliness and life, fulfilling the types and shadows of the altar. 

Jesus's sacrifice was enough to atone for sin and appease God's wrath and anger. These two types of offerings existed in the shadowy service of the temple, atonement for sin offerings and propitiation of food offerings, incense offering, burnt offerings that went up as a sweet smelling aroma to God. We have a reasonable service to enter which is the sacrifice acceptable to God. To pass around an "offering" plate to receive "tithes" of money is at direct contrast to the spiritual realities in Christ. 

The Veil of Moses vs. The Face of Christ

The tragedy of returning to the Old Covenant is the blindness it induces. Paul explains that when the Old Covenant is read, a veil lies over the heart, just as Moses veiled his face to hide the fading glory of the Law (2 Corinthians 3:13-15). This veil is only taken away in Christ.

To serve the Law is to serve Moses, a servant in God's house. To serve the New Covenant is to serve Jesus, the Son and Owner of the house (Hebrews 3:5-6). If one truly believed Moses, they would believe Jesus, for Jesus said Moses wrote of Him (John 5:46). But to remain with Moses now that Christ has come is to choose the servant over the Son, and the shadow over the substance.

Conclusion

The rituals, washings, and written codes of the Old Testament "have indeed an appearance of wisdom in self-made religion... but are of no value against the indulgence of the flesh" (Colossians 2:23). The New Covenant is a circumcision of the heart, by the Spirit, not the letter (Romans 2:29). The glory of God is now found not on Mount Sinai, but in the face of Jesus Christ. To go back is to turn away from that glory, to re-veil the heart, and to reject the freedom for which Christ set us free.