How Does the Old Testament Relate to the New Testament?

Question 1026.

The continuity of Scripture across the Old and New Testaments is one of those questions that sounds academic until you actually try to read the Bible straight through and hit the jarring transition from Malachi’s closing warnings to Matthew’s opening genealogy, and find yourself wondering how these two halves of one book actually relate to each other.

I want to work through this carefully, because how you answer this question shapes an enormous amount of your theology, from how you read Old Testament law to how you understand Israel’s ongoing place in God’s purposes, and dispensational and covenant theology genuinely disagree about the answer in ways worth understanding clearly.

One Unfolding Story, Two Testaments

The Old and New Testaments tell a single, unified story of God’s redemptive purpose, unfolding progressively across time rather than presenting two disconnected or contradictory religious systems. The New Testament writers consistently treat the Old Testament as authoritative Scripture, quoting it constantly, arguing from it directly, and presenting Jesus as the fulfilment of its promises rather than the founder of an unrelated new religion. Jesus Himself, on the road to Emmaus in Luke 24:27, beginning with Moses and all the Prophets, interpreted to them in all the Scriptures the things concerning himself, treating the entire Old Testament as pointing forward to His own person and work. This continuity is fundamental and non-negotiable: the God who spoke through Moses and the prophets is the same God who sent His Son, and the covenant promises given to Israel remain genuinely, permanently valid rather than annulled or replaced.

Where Genuine Discontinuity Also Exists

Alongside this real continuity, genuine discontinuity exists as well, and pretending otherwise flattens Scripture’s own testimony about itself. Hebrews 8:13 states plainly that in speaking of a new covenant, he makes the first one obsolete, and Hebrews devotes considerable space to explaining how the Levitical priesthood, the sacrificial system and elements of the Mosaic law find their fulfilment and completion in Christ’s superior priesthood and once-for-all sacrifice, rather than continuing unchanged into the New Covenant era. Galatians 3:24-25 describes the law as a guardian until Christ came, language that plainly indicates a change in the law’s function once its purpose has been accomplished. The New Testament writers do not treat every element of the Mosaic economy, ceremonial law, the sacrificial system, the specific national covenant given at Sinai, as simply continuing unchanged under the New Covenant.

How Covenant Theology Handles This Tension

Covenant theology handles this continuity and discontinuity by positing a single overarching covenant of grace, administered differently across different periods but fundamentally unified underneath those varying administrations, with Israel and the church treated as essentially one continuous people of God under different covenant administrations. On this reading, much Old Testament language about Israel transfers directly to the church, and many covenant theologians see the church as the true, spiritual Israel, inheriting Israel’s promises in a transformed, non-national, spiritualised form.

How Dispensational Theology Handles the Same Tension

Dispensational theology, my own settled position, handles the same continuity and discontinuity differently, distinguishing genuinely distinct dispensations, identifiable periods in which God relates to humanity under differing administrative arrangements, while still affirming a single, unified plan of redemption running underneath every one of them. Crucially, dispensational theology maintains Israel and the church as two genuinely distinct entities within that one unified plan, rather than treating the church as Israel’s replacement or spiritual fulfilment. The covenant promises given specifically to national Israel, land, seed and blessing under the Abrahamic covenant, kingship under the Davidic covenant, remain intended for literal, future fulfilment to ethnic Israel, exactly as Romans 11:1 and 11:26 insist when Paul asks whether God has rejected his people and answers, by no means, before affirming that all Israel will be saved.

This distinction is not a minor interpretive footnote. It governs how an entire body of Old Testament prophecy gets read, whether promises to Israel about land, national restoration and a coming Davidic kingdom are read literally as still awaiting fulfilment to the actual nation of Israel, or read symbolically as already fulfilled in the church’s present spiritual experience. I hold the literal reading, consistent with the same literal-grammatical-historical method that governs sound interpretation everywhere else in Scripture, and consistent with the plain sense of texts like Ezekiel 36 through 37 and Zechariah 12, discussed at greater length in my article on the Spirit’s role in the Millennium.

The New Covenant as the Hinge Point

The New Covenant, promised in Jeremiah 31:31-34 explicitly to the house of Israel and the house of Judah, functions as the theological hinge connecting both Testaments while also marking real, substantive change. Jesus institutes this same New Covenant at the Last Supper, this cup that is poured out for you is the new covenant in my blood, according to Luke 22:20, and the church now participates in New Covenant blessings, forgiveness of sins, the indwelling Spirit, direct knowledge of God, even while the covenant’s ultimate, complete, national fulfilment to Israel as originally promised in Jeremiah still awaits a future day. This is exactly the kind of already and not yet pattern that runs throughout dispensational reading of Scripture, real present blessing genuinely enjoyed now, alongside a fuller, still future fulfilment that the church’s present experience does not exhaust or replace.

Reading the Old Testament as a Christian Today

Practically, this means reading Old Testament law with real discernment rather than either wholesale application or wholesale dismissal. The moral law, rooted in God’s unchanging character, continues to bind believers today, since it reflects who God is rather than a temporary administrative arrangement. The ceremonial and civil law, given specifically to govern Israel’s national worship and national life under the Sinai covenant, finds its fulfilment in Christ and no longer directly binds New Covenant believers in the same way, even though it remains profoundly instructive about God’s holiness and the pattern of substitutionary atonement it foreshadowed throughout. Distinguishing these categories carefully, rather than collapsing the whole law into either permanent obligation or complete irrelevance, is exactly what a mature, continuity-and-discontinuity-aware reading of Scripture requires.

The Continuity of Scripture Across the Whole Canon

The continuity of Scripture is not simply a matter of theological theory. It shows up concretely in how the New Testament writers themselves treat the Old Testament, quoting it as authoritative Scripture several hundred times, arguing directly from its wording, and assuming their readers share a common, unbroken frame of reference stretching back through the whole Hebrew canon. The continuity of Scripture also shows up in the covenants themselves, each one building on and clarifying what came before rather than replacing it outright. The Abrahamic covenant is not annulled by the Mosaic covenant given centuries later, and Galatians 3:17 makes exactly this point, that the law, given four hundred and thirty years afterward, does not annul a covenant previously ratified by God. Each covenant adds clarity and development to God’s unfolding purpose without cancelling what preceded it.

This pattern of addition and clarification, rather than replacement and cancellation, is the single best way to hold the continuity of Scripture together with the genuine discontinuity this article has also described. The Mosaic law’s ceremonial and civil provisions find their fulfilment and completion in Christ, exactly as Hebrews describes, but the underlying Abrahamic promise of blessing to Israel and, through Israel, to all the nations, remains genuinely, permanently intact, awaiting its fullest future realisation rather than having been quietly reassigned to a different, non-national recipient.

Why the Continuity of Scripture Depends on Keeping Israel and the Church Distinct

I want to press this point once more, since it is where dispensational and covenant readings diverge most sharply and where the stakes are genuinely highest. If the continuity of Scripture is secured by treating the church as Israel’s replacement, inheriting her promises in transformed, spiritualised form, then God’s specific, repeated covenant commitments to ethnic Israel, land, throne, national restoration, effectively go unfulfilled in their originally stated terms, a conclusion that troubles me considerably given how explicitly and repeatedly those promises are stated throughout the Old Testament. If instead the continuity of Scripture is secured by maintaining a single unified plan that nonetheless keeps Israel and the church as genuinely distinct recipients of distinct, though related, covenant promises, God’s faithfulness to His specific word to Israel remains fully, literally intact, exactly as Romans 11:29 insists it must: for the gifts and the calling of God are irrevocable.

It is worth tracing the continuity of Scripture through one further, concrete example: the temple. Solomon builds a physical temple as the locus of God’s dwelling with Israel. The prophets speak of that temple’s destruction and a future, greater temple to come. John’s Gospel identifies Jesus Himself as the true temple, the place where God dwells with humanity in the fullest sense (John 2:19-21). Paul describes the church, both corporately and individually, as a temple of the Holy Spirit (1 Corinthians 3:16, 6:19). And Revelation’s closing vision describes a New Jerusalem with no temple at all, because the Lord God the Almighty and the Lamb are its temple (Revelation 21:22), the entire eternal city itself becoming the place of God’s unmediated presence. That is the continuity of Scripture traced through a single image, physical temple, prophesied future temple, Christ as temple, the church as temple, the eternal city as temple, each stage building on and clarifying what came before without ever contradicting it.

The continuity of Scripture, traced this way through a single recurring image rather than only through abstract covenant theology, makes the whole discussion considerably more concrete and considerably easier to grasp for an ordinary reader. I would encourage you to try this exercise with other major biblical images, kingdom, sacrifice, exile and return, bride, and watch the same pattern emerge again and again: genuine development, genuine clarification, and genuine fulfilment in Christ, without ever a clean break that abandons what came before. My article on the Spirit’s future role in the Millennium traces this same pattern specifically through the theme of the Spirit’s presence, from selective Old Testament empowering to universal Millennial and eternal fullness, offering a further concrete case study in exactly the continuity and development this article has described throughout.

Whichever framework, covenant or dispensational, you find most persuasive after weighing this evidence, hold your conclusion with the same combination of conviction and humility this whole series of articles has tried to model. The continuity of Scripture across both Testaments is not a matter believers should divide sharply over in a spirit of suspicion. It is a shared confidence, held across genuine differences of detail, that the same faithful God has been speaking, promising and fulfilling from Genesis to Revelation without a single broken word along the way.

I recognise this has been a longer, more demanding article than most on this site, and I have not shied away from the genuine complexity of the underlying debate. But the continuity of Scripture is worth this depth of attention, since so much else in how you read your Bible, how you understand Israel, the church, the law, and the promises of a coming kingdom, depends on getting this single question right. Take the time to work through it slowly, checking the actual biblical texts cited here rather than accepting any single summary, including my own, without testing it directly against Scripture itself.

Whatever further study this article prompts you toward, let it never become a substitute for simply reading both Testaments together, watching the promises of the first find their answer in the second, and letting that pattern deepen your own settled confidence in the God who has kept every word He has ever spoken across the whole span of Scripture.

The continuity of Scripture, held together with its genuine discontinuity exactly as this article has traced, gives you a Bible you can read as a single, coherent whole rather than as two loosely related collections awkwardly bound under one cover, and that coherence is itself a quiet, considerable evidence of the single divine mind standing behind every one of its sixty-six books.

One story, two Testaments, a single faithful God keeping every promise across every century, that is the continuity of Scripture in its simplest, most durable form, and it is worth returning to every time the size or complexity of the whole canon feels overwhelming.

Let that settled trust anchor you the next time these categories, dispensational and covenant, continuity and discontinuity, feel abstract or overly technical. Underneath every technical term stands a simple, sturdy confidence: God has kept, and will keep, every single promise He has ever made, to Israel, to the church, and to you personally as one who trusts in His Son.

This is, in the end, why the continuity of Scripture matters so much for ordinary Christian confidence, not as an abstract academic debate, but as the settled ground on which your whole understanding of God’s faithfulness, to Israel, to the church, and to you, ultimately rests, from the first promise in Genesis to the last word of Revelation.

Take up your whole Bible, Old Testament and New together, and read it as the single, coherent, unfailing word it has always been, from its first promise to its final, certain fulfilment still to come in glory.

Hold this together with genuine humility toward believers who read these categories differently, since faithful, careful Christians across church history have reached different conclusions here while still honouring Scripture’s full authority and God’s own unwavering faithfulness to every word He has spoken.

Read both Testaments side by side this week, one chapter from each, and watch this continuity and this development happen in real time on the page in front of you, rather than only as a theological abstraction described secondhand in an article such as this one.

The same faithful God who spoke through Moses still speaks through His completed, unified word today.

So, now what?

The Old and New Testaments are not two different religions awkwardly bound together in a single book. They are one unfolding story, written by one divine Author, moving from promise to fulfilment, with genuine change along the way that never once contradicts the covenant faithfulness God has shown from Genesis onward.

Read your Old Testament as a Christian who knows how the story ends in Christ, and read your New Testament as the fulfilment of promises stretching back to a garden and a serpent and a single verse spoken in Genesis 3:15. Both halves of your Bible are telling you the very same story.

“For all the promises of God find their Yes in him. That is why it is through him that we utter our Amen to God for his glory.” 2 Corinthians 1:20, ESV

For Further Study

Charles Ryrie’s Dispensationalism remains the standard, accessible treatment of these categories, and Arnold Fruchtenbaum’s Israelology addresses the Israel and church distinction in exhaustive, careful detail. J. Dwight Pentecost’s Things to Come develops the New Covenant’s relationship to both Israel and the church, and Lewis Sperry Chafer’s systematic theology treats the dispensational framework at the greatest length among these sources.