A common modern view holds that Christianity is a kind of historical pivot — that God dealt with humanity one way before Christ, then radically changed His approach afterward. Some go further and divide history into a series of distinct “dispensations,” each with its own rules, almost as though God were trying out different operating systems. Others, working from the opposite direction, treat Christianity as a late offshoot of Judaism — a sect that broke away from its parent religion and started writing its own scriptures.

The earliest Christians would have rejected both views. They didn’t see themselves as members of a new religion. They saw themselves as the true heirs of Abraham, worshiping the same God their fathers had worshiped, holding to the same morality that had been binding since Eden, and finally receiving the promised Messiah their prophets had foretold. The Apostle Paul makes this argument relentlessly: the Christian Gospel is not a departure from the faith of Abraham — it is the fulfillment of it (Galatians 3).

This article explains that apostolic view - God’s moral standards have not changed. The covenants have not replaced one another; they have unfolded together, each one building on what came before. And the central figure of the entire story — Christ Himself — has been there from the beginning. The entire covenant history has been an unfolding of God’s love.

God’s Moral Standards Have Always Been the Same

Before there was a Mosaic Law, there was already sin. Before there was a Mosaic Law, there was already righteousness. Before any tablet was written, before any temple was built, before any covenant was formally cut, the basic moral reality of the universe was already in place. Scripture takes pains to make this clear.

The Garden

When Adam and Eve sinned, God didn’t immediately expel them. He came walking in the garden in the cool of the day and called out to them — giving them an opportunity to come forward, confess, and repent (Genesis 3:8-13). They hid instead. They blamed each other and the serpent. The expulsion came only after that refusal. Even at the very beginning, the structure of repentance was already there: God seeks us, gives us opportunity to acknowledge what we’ve done, and meets honesty with mercy. Sin was not the only original problem; the refusal to face it was.

Cain and Abel

Long before Sinai, Cain knew murder was wrong. God said to him plainly: “If you do well, will you not be accepted? And if you do not do well, sin is couching at the door” (Genesis 4:7). After the murder, God approached Cain, gave him a chance to confess, Cain refused, and then after he failed to repent he was punished — for an act not yet codified in any written law. Two lessons are unmistakable: morality didn’t begin with Moses, and repentance didn’t begin with Jesus. They had both been there from the earliest times.

The Apostle’s confirmation

St. Paul makes this explicit: “sin indeed was in the world before the law was given, but sin is not counted where there is no law” (Romans 5:13). And again: “What then shall we say? That the law is sin? By no means! Yet, if it had not been for the law, I should not have known sin” (Romans 7:7). The Mosaic Law didn’t create sin. It illuminated it (Romans 3:20). Sin had always been sin; the law made it explicit so that a particular people could be formed and prepared to receive the Messiah.

The same standard for righteousness

Long before Christ, righteousness was already defined and already required. Noah is called “a righteous man, blameless in his generation; Noah walked with God” (Genesis 6:9). Abraham “believed the LORD; and he reckoned it to him as righteousness” (Genesis 15:6). The entire eleventh chapter of Hebrews (Hebrews 11) is a roll call of pre-Christian saints commended for righteousness. Leviticus puts the standard plainly: “You shall be holy; for I the LORD your God am holy” (Leviticus 19:2). Holiness was the requirement. It always had been.

The Mosaic Law was added to a moral reality that already existed — to teach Israel about it, to guide her toward Christ, and to function, in Paul’s words, as a “pedagogue” or guardian (Galatians 3:24).

What the Mosaic Law Was Actually For

This is the point most often misunderstood. The Mosaic Law’s purpose was not to be the eternal moral standard. Its purpose was to teach, to guide, and to prepare. It was always meant to be transitory.

The blessings and curses attached to the Mosaic Law were almost entirely physical — abundant crops or famine, victory or defeat in battle, health or disease, prosperity or exile (Deuteronomy 28). They were designed to teach a recently freed slave-people, with no national identity of their own, what sin and obedience looked like in the only language they could yet understand: the immediate, tangible consequences of their actions. Notice what the Mosaic Law did not offer: it did not offer eternal life. It did not offer entry into heaven. It did not offer forgiveness of sins in the deep sense Christians now mean. As Paul tells the Galatians, “if a law had been given which could make alive, then righteousness would indeed be by the law” (Galatians 3:21). But there wasn’t, and it couldn’t.

So what could a faithful Israelite under the Mosaic Law actually do? The best he could do was try to try to remain sinless. But sinlessness is not the same thing as righteousness. Sinlessness is the absence of wrong; righteousness is the presence of active, living union with God. The Mosaic Law could point at sin and forbid it. It could not produce righteousness, because righteousness, properly speaking, hadn’t yet been revealed. As Christ Himself told His disciples: “many prophets and righteous men longed to see what you see, and did not see it” (Matthew 13:17).

Moses wasn’t wrong. The law wasn’t wrong, for its time and limited purpose. The problem was that the law, by itself, could only do half the job. It could illuminate sin without producing the union with God that overcomes it. That awaited Christ and the fulfillment of God’s long awaited plan.

We unpack the Mosaic law more in The Three Laws of the Old Covenant: What Still Applies for Christians Today.

The Covenants Don’t Replace Each Other — They Unfold Together

“It is not as though the word of God had failed.” (Romans 9:6)

Here we come to one of the most important and least understood points: a new covenant does not automatically nullify the older ones. Paul makes this explicit in Galatians 3:17 — “the law, which came four hundred and thirty years afterward, does not annul a covenant previously ratified by God, so as to make the promise void.” It’s not as if God made a mistake and said, oops, let’s try again. All of covenant history points toward God’s attempt at reconciliation with mankind in a cohesive increasingly revealed fashion.

There are seven of these covenants, or promises, explicitly recorded between God and His people in Scripture. Several of them remain active today, fulfilled and expanded — not replaced — in Christ.

1. The Covenant in Eden

God commissions humanity to be fruitful, to multiply, to tend creation as His stewards, and to live in partnership as man and woman (Genesis 1:28; 2:15). After the Fall, He pronounces curses, closes Eden with cherubim and a flaming sword (Genesis 3:24), but also gives the first promise of a new woman and her son, the future Messiah, who will crush the serpent’s head (Genesis 3:15). The Good News of God’s love for humanity was present at the beginning — promising mankind redemption even at our weakest moment. The structure of that original commission — humanity as steward, marriage as partnership, creation as initially good and in God’s image — has never been revoked.

2. The Noahide Covenant

After the flood, God establishes a covenant with Noah, his descendants, and every living creature — animals included (Genesis 9:8-17). He promises never again to destroy the earth by flood, with the rainbow as the ongoing sign. He also reveals new specifics of the moral law: do not shed innocent blood; humans are permitted to eat meat. This covenant is still active. There are still rainbows. Notice that Cain was already punished for murder long before this covenant made the prohibition explicit — confirming once again that morality is unchanging, only its revelation is progressive.

3. The Abrahamic Covenant

God calls Abraham — chosen, like Noah, for his righteousness and faith (Genesis 15:6) — and makes three promises: descendants as numerous as the stars, a promised land, and that “by you all the families of the earth shall bless themselves” (Genesis 12:3). The covenant’s outward sign is circumcision. Paul argues at length that this covenant is still active, and that Christians are its true heirs — not by genealogy but by faith. “If you are Christ’s, then you are Abraham’s offspring, heirs according to promise” (Galatians 3:29; see also Romans 9:8). Baptism is the “circumcision made without hands” (Colossians 2:11) by which we are adopted into Abraham’s family — even as infants, as young as 8 days old. The promised land, Paul and the writer of Hebrews explain, was always pointing beyond itself toward the heavenly homeland (Hebrews 11:13-16).

4. The Mosaic Covenant

Given through Moses at Sinai, this covenant formed Israel into a distinct nation set apart for God’s purposes — the “incubator,” so to speak, in which the Messiah would eventually be born. Its blessings and curses were physical; its purpose was pedagogical; its end was always foreseen. It was never meant to be everlasting. Moses himself prophesied that “The LORD your God will raise up for you a prophet like me from among you, from your brethren — him you shall heed” (Deuteronomy 18:15) — a prophecy the New Testament identifies as fulfilled in Christ (Acts 3:22). Hebrews quotes Jeremiah at length to show that the prophets themselves foresaw this covenant being superseded: “In speaking of a new covenant he treats the first as obsolete. And what is becoming obsolete and growing old is ready to vanish away” (Hebrews 8:13). This is the one covenant that, in its specific Mosaic form, has indeed passed away in Christ — though, as we’ll see in a moment, the underlying moral and worship realities it taught remain. And since it pointed to Christ — the author of all that is Good — it illuminated what sin was.

5. The Davidic Covenant

God promises David that his royal line will endure forever, that one of his descendants will reign on an eternal throne, and that this descendant will build a house for God’s name (2 Samuel 7:12-16). Christ, the Son of David, fulfills this covenant. He reigns eternally; and the “house” He builds is the Church itself, made of “living stones” (1 Peter 2:5), with His people as the temple of the Holy Spirit (1 Corinthians 3:16; 6:19). All of this remains true and ongoing — the Church, as the house made of living stones, is still being built and growing to this day, with Christ as the cornerstone (Ephesians 2:20-21).

6. The New Covenant in Christ

Promised through the prophets (Jeremiah 31:31-34), inaugurated at the Last Supper (“This cup which is poured out for you is the new covenant in my blood” — Luke 22:20), and proclaimed at Pentecost (Acts 2). In this covenant, righteousness is finally revealed (Ephesians 3:5; Colossians 1:26-27). Forgiveness of sins becomes truly available, because God Himself has entered our nature, lived sinlessly, and offered Himself as the once-and-for-all sacrifice (Hebrews 9:11-15). Sin no longer has to be the defining obstacle to relationship with God. The gates of heaven, closed since Eden by a flaming sword, are reopened — first to those held in Sheol awaiting Christ’s coming (1 Peter 3:18-22; 4:6), and then to all who would unite themselves to Him. We call this union with God theosis.

7. The Final Covenant

Promised in Revelation 21:1-4 — the New Heaven and New Earth, when “God himself will be with them; he will wipe away every tear from their eyes.” This is what the entire arc has been building toward.

Seven covenants. Seven, the number of holy completion. Several of them are still active and in force today: the Noahide, the Abrahamic, the Davidic, and the New Covenant in Christ all remain operative, each one nested within and fulfilled by the others. The Christian faith is not a replacement of the older covenants but their flowering.

Christianity as the Fulfillment of the Faith of Abraham

This is why early Christians did not understand themselves as members of a new religion. Paul, writing to a mixed congregation of Jewish and Gentile believers, repeatedly insists that the Christian faith is the faith of Abraham, now opened to all nations as Abraham was promised it would be. “So you see that it is men of faith who are the sons of Abraham. And the scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying, ‘In you shall all the nations be blessed’” (Galatians 3:7-8).

The implication is striking. Christians are the New Israel — not in the sense of replacing the genealogical, ethnic Jewish people, but in the sense that the Abrahamic promise has now spread, as it was always meant to, “to every nation, and tribe, and tongue, and people” (Revelation 14:6). “For not all who are descended from Israel belong to Israel, and not all are children of Abraham because they are his descendants” (Romans 9:6-7). The defining mark of being Abraham’s child was always faith, never genealogy alone. Thus our justification for being called children of God is our faith, not our genetics.

This is also why early Christians read the entire Bible — Old and New Testament together — as a Christian book. Christ Himself, on the road to Emmaus, “beginning with Moses and all the prophets, interpreted to them in all the scriptures the things concerning himself” (Luke 24:27). Paul tells the Romans, “whatever was written in former days was written for our instruction” (Romans 15:4). The writer of Hebrews opens his letter with the assertion that God, “in many and various ways spoke of old to our fathers by the prophets; but in these last days he has spoken to us by a Son” (Hebrews 1:1-2). It is the same God speaking the same message — first in fragments, finally in a Person.

You can see the trajectory clearly when you place the Christian Old Testament in its traditional order:

  • The books of the Law (Genesis through Deuteronomy) reveal sin and form a covenant people.
  • The historical books (Joshua through Esther, including the deuterocanonical books) trace Israel’s struggle to live up to that covenant.
  • The prophetic books introduce an explicit future Messiah, an everlasting kingdom, and a true righteousness that will exceed the law.
  • The wisdom books (Job, Psalms, Proverbs, Ecclesiastes, Song of Solomon, Wisdom, Sirach) shift toward an inward, personal vision of righteousness and union with God — increasingly independent of the legal code.

Some of the latest Old Testament books, written closer to the time of Christ, are striking in how Christian they sound. The Wisdom of Solomon contains explicit accounts of the suffering righteous one (Wisdom 2:12-20) that read almost as a prophecy of the Passion. 2 Maccabees contains the clearest pre-Christian statement of bodily resurrection: “You accursed wretch, you dismiss us from this present life, but the King of the universe will raise us up” (2 Maccabees 7:9). It also expresses the same hierarchy of fears Christ later teaches — fear God, not man — almost word-for-word (compare 2 Maccabees 7:29 with Matthew 10:28). It is no accident that some of these later books were rejected by 2nd-century Jewish authorities precisely because they sounded “too Christian” — and equally no accident that the early Christian Church received them as Scripture - including them in the Bible. They are part of how God prepared the world for Christ.

The Whole Plan Was One Plan

“He was destined before the foundation of the world but was made manifest at the end of the times for your sake.” (1 Peter 1:20; see also Ephesians 1:4, 9-10; 2 Timothy 1:9)

Step back and look at the whole. Creation. Fall. Promise. Patriarchs. Nation. Law. Prophets. Wisdom. Incarnation. Cross. Resurrection. Pentecost. Church. Second Coming. New Creation.

This is not a series of disconnected eras with different operating rules. It is one long act of divine love — the patient, unfolding work of a God who, as Paul writes, was “in Christ, reconciling the world to himself” (2 Corinthians 5:19) from before the foundation of the world. He waited until “the time had fully come” (Galatians 4:4) — until humanity had reached the maturity that could receive the full revelation. He has not changed His mind, never lost the plot, never improvised a new system to replace a failed one. The end was present in the beginning.

The same loving God who walked in Eden walked the road to Emmaus. The same Word who said “Let there be light” became flesh and dwelt among us. The same righteousness that Abel offered, and Noah practiced, and Abraham believed, and Moses pointed to, and the prophets foretold, and the wisdom literature contemplated — that same righteousness now lives in us, by union with Christ, through the gift of the Holy Spirit.

This is why early Christians did not see themselves as starting something new. They saw themselves as the people for whom everything had been preparing. We still do.

Continuing the Core Faith Series

If the New Covenant fulfills the Old, what about all those Old Testament laws? Why don’t Christians keep kosher but do follow the Ten Commandments? The next article in the Core Faith series walks through how the apostolic Church has always read the Mosaic Law — what still applies, what was fulfilled in Christ, and how to make sense of Christ’s claim that He came not to abolish the Law but to fulfill it.