A bare reference to Matthew 5, invoking Jesus's own words: "Do not think that I have come to abolish the law or the prophets; I have not come to abolish but to fulfill. For truly I tell you, until heaven and earth pass away, not one letter, not one stroke of a letter, will pass from the law until all is accomplished" (Matt 5:17-18). Combined with the OT's own permanence claims (Deut 4:2; Isa 40:8), the objection reaches its sharpest form here: it is not only the Old Testament but Jesus himself, in the New Testament, who explicitly and emphatically reaffirms the law's permanence in the strongest available terms — yet the apostolic church almost immediately set aside circumcision (Acts 15), dietary law (Mark 7:19; Acts 10), animal sacrifice (Hebrews), and codified Sabbath-keeping (Col 2:16), decades before any 'heaven and earth passing away.' This is not a tension between two Testaments but an alleged contradiction between the founder's own recorded words and the practice of his own movement.

The steelmanned objection turns on collapsing 'fulfill' and 'abolish' into the same thing, when Matthew's Greek carefully distinguishes them. Jesus uses two precise, contrasting verbs: *katalyō* (καταλύω) — 'to tear down, demolish, nullify,' the same verb Matthew later uses of destroying the Temple's stones (Matt 24:2; 26:61) — and *plēroō* (πληρόω) — 'to fill up, bring to its intended completion, fulfill.' Jesus explicitly denies the first and claims the second: 'I have not come to *katalyō* but to *plēroō*.' Whatever this means, it is by definition not abrogation; the objection's premise that Jesus 'reaffirms permanence' in a way excluding fulfillment-transformation already begs the question against the very distinction the text draws. The controlling qualifier in v.18 is 'until all is accomplished' (heōs an panta genētai), paired with, not subordinate to, 'until heaven and earth pass away.' Matthew's Gospel is built around a repeated fulfillment-citation formula (*hina/hopōs plērōthē*, used roughly a dozen times) marking Jesus's birth, ministry, death, and resurrection as the accomplishment toward which Scripture pointed (explicitly of his passion at 26:54, 56). Within Matthew's own literary and theological framework, 'until all is accomplished' most naturally names that very accomplishment — Christ's death and resurrection — as the terminus in view, while 'heaven and earth pass away' functions as a stock idiom for 'as long as the world stands' (compare Ps 72:5,7 and Ps 89:36-37, which use the same heaven/earth/sun/moon permanence idiom for divine promises that are enduring-in-purpose without every specific clause being read as literally cosmologically eternal). The idiom's function in Hebrew rhetoric is emphasis on reliability, not a metaphysical claim about every ceremonial detail. The decisive move, however, is that this whole tension is already anticipated and resolved within the Hebrew Bible's own canon, centuries before Matthew was written. Jeremiah 31:31-34 declares: 'The days are surely coming, says the Lord, when I will make a new covenant with the house of Israel and the house of Judah. It will not be like the covenant that I made with their ancestors... though I was their husband... I will put my law within them, and I will write it on their hearts.' The phrase 'not like' (lōʾ ḵabbərîṯ) explicitly marks a change of covenant *kind* — administrative structure, mode of law-keeping (written on the heart rather than on tablets) — while 'I will be their God, and they shall be my people' marks unbroken continuity of covenant *purpose* and *partner*. This is the Hebrew canon's own prophetic self-critique and self-correction of a static reading of Sinai; the very 'contradiction' the objection alleges is predicted, by name, inside the Old Testament. Hebrews 8:7-13 quotes Jeremiah 31 at length and draws the explicit conclusion: 'In speaking of a new covenant, he has made the first one obsolete.' Hebrews 8-10 then mounts an extended argument that the Levitical/ceremonial system was always 'a shadow of the good things to come and not the true form of these realities' (Heb 10:1) — its own internal logic (repeated sacrifices that never finally take away sin, a mortal priesthood) already implies its provisionality; fulfillment completes rather than falsifies that logic. Honest concession: precisely which OT commands sort into 'moral,' 'ceremonial,' and 'civil/judicial' categories is a real and sometimes debated question even among those who accept this basic framework — Reformed, Lutheran, and Catholic covenant theologians have genuine, ongoing disagreements at the margins (Sabbath-observance debates are the clearest modern example). That internal debate about category-boundaries is not a defect in the framework itself but the normal condition of applying any principled distinction to a large body of specific texts.

This threefold account of the law — moral law (the Decalogue's God- and neighbor-directed duties) as a permanent expression of unchanging natural law and God's own character; ceremonial law (sacrifice, purity codes, dietary law, circumcision) as typological, pointing toward and fulfilled in Christ, and rendered obsolete in its own terms once the type meets its substance; civil/judicial law as specific to Israel's ancient theocratic nationhood — is not an ad hoc modern workaround. It is the mainstream, historic Christian systematic account across traditions, formalized already by Thomas Aquinas (*Summa Theologiae* I-II q.99) but rooted in patristic exegesis: Irenaeus (*Against Heresies*, Book IV) distinguishes the 'naturally just precepts' given to Israel from the added ceremonial 'bonds of slavery' imposed because of hardness of heart, and Augustine repeatedly deploys the shadow/reality distinction that Hebrews itself supplies. It lets the Christian affirm, with full consistency, both that God's word never fails (Isa 40:8) and that his own predicted new covenant (Jer 31) has now been inaugurated in Christ's blood — Jesus's own words at the Last Supper, 'this cup that is poured out for you is the new covenant in my blood' (Luke 22:20), are a deliberate, self-conscious echo of Jeremiah 31, showing Jesus locating his own death precisely at the hinge Jeremiah had prophesied six centuries earlier.