Unknown Author
20 min
This paper explores the complex relationship between the Mosaic administration and the New Covenant through a "Mosaic Dual Pedagogy - Mediatorial Finality" framework. The central research question concerns how to reconcile the obvious historical differences between Old Testament and New Testament life without creating two different species of salvation. The author challenges the view that Old Testament believers lived in a state of "defective" salvation or that the New Covenant introduced entirely new saving benefits like regeneration or justification.
Central to the paper is the concept of two simultaneous pedagogical realities in the Mosaic order. First, the moral law continues to provide a perennial pedagogy that humbles and instructs the sinner, which predates and survives the Mosaic administration. Second, the Mosaic system included a temporary, institutionally dispersed pedagogy—priests, temple, and sacrifices—that served to teach Israel to "not yet" have the final Mediator in their presence.
Crucially, the author argues that historical dispersion does not fragment the saving object. Even before the incarnation, the Holy Spirit united the elect to the whole promised Mediator. The New Covenant is therefore not "new" because it creates saving faith for the first time, but because the promised Mediator has finally arrived, accomplished redemption, and personally concentrated the previously dispersed offices of prophet, priest, and king into His own person.
For students of theology, this framework provides a method for reading the Old Testament as genuinely Christian while respecting its distinct institutional character. By distinguishing between historia salutis (the history of redemption) and ordo salutis (the order of application), the paper prevents the common error of projecting historical accomplishments backward in a way that erases the genuine reality of life under promise. This ensures that the "surpassing glory" of the New Covenant is affirmed without suggesting that Old Testament saints were left without the saving life of Christ.
Alex: That sounds persuasive for repeated sacrifices. How does the framework extend it to prophets and kings?
Sam: It describes revelation, priesthood, and royal rule as distinguishable dimensions of mediation. In the ordinary Old Testament order, they are distributed across people and institutions. The Davidic king is not the Aaronic high priest, and prophetic revelation is not inherited as either office is.
Alex: But the excerpt recognizes people who cross those functional boundaries. Doesn’t Moses complicate a clean separation?
Sam: The document explicitly allows overlap. Moses has extraordinary prophetic, ruling, and intercessory functions; David speaks prophetically. Its claim is narrower: overlap does not produce an ordinary lawful officeholder possessing final revelation, final priestly access, and final royal dominion.
Alex: And Christ brings those together personally, rather than just coordinating separate institutions.
Sam: That is what it calls mediatorial concentration: prophetic, priestly, and royal mediation converging in Christ. He is not merely another prophet, a more effective priest, or a better king. The associated realities also converge: sacrifice, sanctuary, access, throne, and inheritance.
Alex: Give me a case where faithful service still falls short. Otherwise, this could just be an argument that Israel needed better leaders.
Sam: The document uses Josiah. He reads the covenant book, directs sanctuary cleansing, and restores Passover. His wholehearted turning receives exceptional commendation. Yet he remains a creaturely king, with royal and priestly responsibilities still differentiated.
Alex: Judah’s judgment also remains. Does the framework treat that as proof that even faithful reform cannot work?
Sam: No. It says the continuing sentence answers accumulated covenant provocation, not Josiah’s reform or the institutions’ provisional character. His obedience is meaningful, but neither sinless nor meritorious. His case supports the distinction without independently proving the entire constitutional argument.
Alex: Now the harder question: if those institutions were unfinished, how could they genuinely communicate salvation rather than just describe a future possibility?
Sam: The framework says their saving efficacy came from the promised Christ, applied by the Spirit. They were not independent sources of salvation. Nor did believers bypass them to obtain Christ elsewhere. The same administration gave Christ savingly while teaching people to await his historical work.
Alex: That seems to make a future event responsible for a present benefit. Does the document require causation running backward through time?
Sam: It explicitly rejects that explanation. God’s appointment and promise guarantee Christ’s future accomplishment; the Spirit communicates its benefits under promise. Christ’s actual incarnate work remains the historical saving ground. Divine certainty does not replace that work or make it already completed.
Alex: Then the distinction is between when redemption happens and when its benefits can be received.
Sam: Yes, with an additional claim: earlier believers receive the whole promised Mediator, not detached benefits. Their union with Christ means a real saving bond through the Spirit and faith. It does not imply that Christ’s human nature existed before the incarnation.
Alex: What is actually distinctive here relative to the approaches the document names?
Sam: Its contribution is the integrated framework: enduring moral instruction, temporary institutional teaching, and the same saving participation across both periods. It also identifies a narrow disagreement with Gaffin. Union administered from the exalted Christ is distinctively New Covenant, but the framework denies that this excludes earlier union with the promised Mediator.
Alex: How firmly is that conclusion established? This is textual theology, not a study with a sample and an effect estimate.
Sam: Its evidence is scriptural interpretation and confessional reasoning. Westminster teaches one covenant of grace, effective Old Testament ordinances, and communication of Christ’s benefits before their historical accomplishment. The framework combines those claims with the confession’s account of the church across all ages.
Alex: But does Westminster explicitly state the full conclusion about earlier union?
Sam: The document acknowledges that its exact technical formulation is not a verbatim Westminster proposition. It calls it a direct and substantial theological entailment. My assessment is that the support is strongest as an internal argument within those confessional commitments, not as an independently demonstrated consensus.
Alex: After all that continuity, what positive newness remains?
Sam: Accomplishment, not merely a later date. Christ has obeyed, borne the curse, offered himself, risen, ascended, and taken his throne. The temporary Mosaic order becomes obsolete through fulfillment. The Spirit is poured out from accomplished mediation, with fuller disclosure, greater boldness of access, and extension among the nations.
Alex: That does not mean every later believer is holier than Abraham or David.
Sam: The document expressly rejects that inference. The superiority concerns the covenantal administration, not every individual’s spiritual attainment. It also distinguishes final administration from consummation: perfected communion in bodily resurrection and renewed creation. The church still awaits that future.
Alex: Who should read the full document, and where should they begin?
Sam: Researchers in covenant theology should start with “Dual Mosaic Pedagogy.” Then read the discussion of Old Testament union with Christ and the Hebrews argument about final priesthood. Those passages expose both the framework’s central distinction and its most consequential interpretive claim. We have an excerpt, so this assessment cannot cover omitted arguments.
Alex: And what should everyone else carry away?
Sam: New in history does not have to mean first available in salvation. That is the document’s organizing claim—and the distinction to test when reading it closely.
Alex: Thanks for listening.