Tertullian argues that heretics should be barred from debating Scripture at all, because only the churches founded by the apostles have legal title to the apostolic writings and the rule of faith they contain.
De Praescriptione Haereticorum ("On the Prescription of Heretics") is Tertullian's legal-style brief against engaging heretical teachers like Marcion, Valentinus, and Apelles in scriptural argument. Rather than refuting their exegesis point by point, Tertullian borrows a Roman courtroom tactic, the "prescription," a procedural objection that stops a case before it is heard on the merits. His prescription is simple: Scripture belongs to whoever holds the apostolic rule of faith, and heretics, by definition, do not hold it, so they have no standing to appeal to the texts in the first place.
The treatise opens by normalizing the existence of heresy itself (chapters 1-6), then attacks the misuse of "seek and you shall find" as a license for endless doctrinal curiosity (7-14). Tertullian then lays out his central move: Scripture is not neutral ground for debate (15-19), because the apostles received a single, fixed rule of faith from Christ and handed it down complete, without secret or partial content, to the churches they founded (20-28). He traces the churches' unbroken chain of bishops back to the apostles, dates Marcion and Valentinus precisely to the mid-second century under Bishop Eleutherus, and argues that anything later than the apostolic churches, anything not attested by the direct succession of teaching, is by definition an adulteration (29-37). The closing chapters catalogue how heretics tamper with the text itself, compare their patchwork exegesis to literary parodies stitched from Virgil, and contrast the heretics' undisciplined communal life (women teaching and exorcising, offices traded overnight, doctrine remade at each leader's private judgment) with the settled order of the catholic churches (38-44).
Written around 200 CE, De Praescriptione Haereticorum is the founding document of the "apostolic succession" argument that would anchor Catholic and Orthodox ecclesiology for the rest of church history, and it supplies some of the best surviving external evidence for how a late-second-century African Christian dated and located his opponents: Marcion as a Pontic ship-captain expelled from the Roman church under Eleutherus, Valentinus as a Platonist, Apelles undone by the prophetess Philumene. Its heresiological method, treat competing readings as forgeries traceable to identifiable founders and communities rather than adjudicating them exegetically, became a template copied by Irenaeus, Epiphanius, and the wider anti-heretical tradition, making the work a key primary source for reconstructing the early Christian sects it names.
“It is vain and thoughtless, then, that so many are scandalized by this very fact, that heresies have such power. As if, were they not powerful, they would ever have come to exist at all.”
— Chapter 1
“What, then, does Athens have to do with Jerusalem? What has the Academy to do with the Church? What have heretics to do with Christians?”
— Chapter 7
“Now the sense of this saying rests on three points: the matter, the time, and the manner. In the matter, you must consider what is to be sought; in the time, when; in the manner, how far.”
— Chapter 10
“Now the rule of faith is this — so that from this point on I may declare what it is we are defending — the rule, that is, by which we believe: that there is one God only, and none other besides the maker of the world, who brought forth the universe out of nothing through his own Word, sent forth before all things.”
— Chapter 13
“By what right, Marcion, do you cut down my forest? By what license, Valentinus, do you divert my springs? By what authority, Apelles, do you shift my boundary-markers?”
— Chapter 37
It is a Roman legal term for a procedural objection that halts a lawsuit before its substance is even argued. Tertullian applies it to heretics: instead of debating what a disputed verse means, he argues the heretic has no legal standing to cite Scripture at all, since Scripture belongs only to the churches holding the apostolic rule of faith.
He says scriptural combat is a rigged contest where each side can quote passages against the other with no decisive winner, leaving the undecided listener more confused than before (chapters 18-19). He proposes settling the prior question first, whose teaching descends from the apostles, and argues that once that is settled the scriptural claims of outsiders become moot.
In chapter 13 he states it directly: one God who made the world through his Word, that Word incarnate as Jesus Christ born of the Virgin Mary, his crucifixion and resurrection, the sending of the Holy Spirit, and a final judgment with bodily resurrection. He treats this compact statement as fixed and complete, so that further inquiry beyond it is unnecessary and even dangerous.
They are Tertullian's primary targets. Marcion, a Pontic ship-captain and former Stoic, rejected the Old Testament's God as the true Father of Jesus; Valentinus, a former Platonist, taught an elaborate system of divine emanations called Aeons; Apelles, once a follower of Marcion, broke away after an affair and built his teaching on the visions of a woman named Philumene. Tertullian dates all three to the mid-second century, under Bishop Eleutherus of Rome.
He points to specific churches that can name an unbroken line of bishops back to an apostle or apostolic man, such as Smyrna's Polycarp appointed by John and Rome's Clement ordained by Peter (chapter 32). Any teaching agreeing with these churches' rule is deemed apostolic truth; teachings that diverge, no matter how old their proponents claim them to be, are convicted by their disagreement alone.
In chapters 41-43 he describes them as undisciplined: no clear line between catechumens and full believers, women teaching, arguing, exorcising, and possibly baptizing, and church offices, bishop, deacon, reader, traded overnight without stable order. He treats this social looseness as itself evidence of doctrinal error, arguing that conduct and doctrine mirror one another.
In chapter 39 he cites Hosidius Geta's Virgilian cento on Medea and the Homer-patchers who stitch new poems from fragments of Homer as parallels to how heretics rearrange scriptural language to make it say something the original never meant, showing the technique was a recognized literary trick, not proof of a hidden lost meaning.
No; he argues heresies were necessary and foretold (chapters 4, 29-30), serving to expose who truly holds the faith under trial, much as Christ's betrayal was necessary yet still condemned in the betrayer. Necessity, he insists, does not make heresy good, only inevitable and instructive.
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