The Mark Irenaeus Knew: Mark 16:9–20 and the Second-Century Church

The Witnesses They Cannot Count — Part I: The Gospels the Church Received — Article 3

Modern readers are often introduced to Mark 16:9–20 by being told that the “oldest and best manuscripts” end at verse 8. The statement directs attention to a serious fact. Codex Vaticanus and Codex Sinaiticus do end Mark at the words, “for they were afraid” (Mark 16:8). A responsible defense of the received text does not conceal that fact, soften it, or talk as though it did not matter.

But neither does that fact settle the history of the Gospel. A textual theory must account not only for the copies still in our hands, but also for the church’s documented use of the text before those copies were produced. In the case of Mark’s longer ending, the first great witness is Irenaeus of Lyons.

Writing near the end of the second century, Irenaeus says:

Also, towards the conclusion of his Gospel, Mark says: “So then, after the Lord Jesus had spoken to them, He was received up into heaven, and sits on the right hand of God.”¹

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1. Irenaeus, Against Heresies 3.10.5, available at New Advent. The statement is explicit: “towards the conclusion of his Gospel, Mark says” before quoting Mark 16:19. ↩

He is citing Mark 16:19. More than that, he expressly identifies the sentence as Mark’s and calls it the conclusion of Mark’s Gospel. The assertion is so clear that the usual effort to make Irenaeus disappear does not begin with an argument about the words. It begins by changing the question.

The question becomes, “Does one citation prove every word of Mark 16:9–20?” Of course it does not. But that is not the question Irenaeus was brought forward to answer. He proves something more basic and more damaging to the theory that the longer ending is a late invention: by about the end of the second century, a major Christian teacher received Mark 16:19 as belonging to the conclusion of Mark’s Gospel.

That is evidence. It is early evidence. And it is evidence which exists even though the copies Irenaeus used have not survived.

Irenaeus does not merely sound like Mark

There is a large difference between an allusion and a citation. A preacher might speak of Christ’s ascension and resemble Mark 16:19 by accident, by common doctrine, or by use of Luke. Irenaeus leaves no room for that uncertainty. He introduces the words with a literary attribution: “Mark says.” He locates them “towards the conclusion of his Gospel.” Then he quotes the recognisable sentence.

This is exactly the kind of patristic testimony textual historians ought to prize. It supplies an author, a book, a location, and a wording. It is not a vague echo of the resurrection. It is not a later lectionary note that may or may not refer to Mark. It is a second-century theological argument which depends upon the written Gospel.

Irenaeus’s use of the text is also germane to his purpose. He is arguing from the Gospels and the prophets that the Father announced by the prophets is the Father of the Lord Jesus Christ. Mark’s declaration that the ascended Lord “sits on the right hand of God” is brought forward with Psalm 110. The quotation is not decorative. It is part of an argument in which the authority of the evangelist matters. Irenaeus calls the text “the true Gospel” and treats its conclusion as a witness to the identity of the God confessed by Christians.²

The force of the evidence should be stated carefully. Irenaeus’s Greek composition is known in substantial measure through ancient translations and citations. That fact prevents a reckless claim that we possess a photographic transcript of the exact Greek exemplar on his desk. Yet it does not make the witness vanish. His explicit attribution to Mark and his quotation of the verse show that the longer ending was received as Markan Scripture in the second-century church to which he belonged.

The distinction matters. Confessional bibliology does not ask its readers to pretend that a Father’s citation is a newly discovered papyrus. It asks them to count a Father’s citation as what it is: historical testimony to a text and a reception which may be older than the oldest surviving manuscript.

The chronological problem for a theory of late invention

Irenaeus was not a fifth-century commentator harmonizing an established Byzantine text. He wrote long before Codex Vaticanus and Codex Sinaiticus were copied. His life joined Asia Minor, Rome, and Gaul. He knew the churches of the West as bishop of Lyons, while his earlier formation was bound up with the Asian churches and with Polycarp, whom he remembered as a hearer of John’s disciples. None of this turns Irenaeus into an apostle. It does make it historically irresponsible to place him at the end of the chain.

The longer ending was therefore not a medieval embellishment which drifted backward into the Gospel after the manuscript tradition had settled. It was known as Mark’s conclusion within the second-century church. A critic may still propose that it entered Mark between the apostolic age and Irenaeus. But that proposal now has a burden. It must explain how a substantial ending, attributed specifically to Mark, became established in churches spread across the Mediterranean early enough for Irenaeus to cite it without apology as the conclusion of the Gospel.

The question is not answered by saying that Vaticanus and Sinaiticus are older extant manuscripts than most copies which contain the ending. That observation is true, but it does not make Irenaeus cease to be earlier than both. The evidence does not line up in a single queue ordered by the physical age of surviving parchment. A Father’s dated quotation is evidence of a text known at the time of the Father. The manuscript which preserves the Father’s work may be late, just as a late copy of Tacitus can bear witness to a much earlier author. Historical reasoning requires us to distinguish the date of the surviving artifact from the date of the testimony it transmits.

This is the elementary point the modern manuscript census too often obscures. Extant objects are not the same thing as extant evidence.

What verse 19 establishes about the ending

Some critics concede Irenaeus and then try to isolate verse 19 from the rest of the longer ending. The maneuver has a superficial plausibility. Irenaeus quotes one verse, not twelve. But it cannot carry the weight placed upon it.

Mark 16:19 is not a detachable sentence which could naturally have circulated as an independent maxim. It occurs within the narrative resolution of verses 9–20: appearances of the risen Christ, the rebuke of unbelief, the commission to preach the Gospel, the promised confirmation of the apostolic message, the ascension, and the disciples’ going forth to preach. When Irenaeus calls verse 19 the conclusion of Mark’s Gospel, he bears witness to the existence of a Markan conclusion in which that verse stood.

He does not, by the citation alone, prove the exact textual form of every preceding verse. No honest scholar should claim that. But he does make the common story of a late ending look historically strained. The ending is already part of the church’s public Gospel in the second century. It does not arrive as an anonymous appendix whose origin no one can name.

The point has a pastoral consequence. The church should not be taught that the ending of Mark is a bare relic of late ecclesiastical imagination. Irenaeus knew it as the evangelist’s own conclusion. A modern edition which places the passage in brackets owes its reader more than the announcement that two famous codices omit it. It owes an explanation of why the older patristic testimony is being subordinated to a reconstructed account of the text’s history.

The omission in Vaticanus and Sinaiticus must be explained

It would be no defense of the Received Text to turn Irenaeus into a talisman and act as though the omission in Vaticanus and Sinaiticus disappears. Those codices are real witnesses. Their agreement in ending the Gospel at verse 8 requires explanation. It is evidence of a stream of transmission in which the longer ending was absent.

But the question is which explanation best accounts for the whole record.

One proposal says that Mark originally ended at verse 8 and that the church supplied a conclusion later. This explains the two codices neatly. It does not explain Irenaeus neatly. It must posit a remarkably early and successful addition—one accepted as Mark’s conclusion, used in theological argument, translated, read in churches, and eventually transmitted across broad regions—while leaving no clear patristic account of the moment when the addition was made.

Another proposal says that the Gospel was originally complete, but that a line of copies lost or omitted the final verses. This explains Irenaeus directly. It also explains why later church use, versions, and lectionaries can preserve the ending while some early Greek witnesses lack it. The proposal must still explain the pattern of omission; the next article will take up the relevant testimony. But it does not require the church to have embraced, without notice, a twelve-verse fabrication and then uniformly treated it as part of Mark.

Neither explanation may be judged simply by asking which one gives the cleaner account of two manuscripts. Textual history is not a contest to find the smallest dataset. The correct account must explain all the evidence: manuscripts, versions, lectionaries, citations, literary attribution, and the church’s actual reading of the Gospel.

The question is therefore not, “Can Irenaeus overrule Vaticanus and Sinaiticus?” That language already treats the witnesses as if they sat in a modern committee and cast equal votes. The better question is, “What history of Mark accounts for Irenaeus’s explicit second-century citation and the fourth-century omissions?” The answer must be historical before it is numerical.

The church’s reception is public evidence

Irenaeus’s quotation is particularly important because it is public. He does not say, “I have a private tradition which differs from the churches.” He argues from the fourfold Gospel received among Christians. His method assumes that the written Gospel is a common authority in the church.

That is why the church’s reception matters in textual questions. Reception is not a vote by ignorance. It is the long, public life of a text among those who read it aloud, copied it, translated it, preached from it, and appealed to it in controversy. Such use can be mistaken in a particular instance; the church is not inspired in every act of copying or interpretation. But it cannot be discarded as though God’s providence had no concern with the ordinary means by which His Word was delivered to His people.

The Westminster Confession is exact here. The church’s testimony may move believers to a high and reverent esteem of Scripture, but Scripture’s authority rests in God its author, and full persuasion comes by the Spirit bearing witness by and with the Word.³ That distinction protects the believer from two opposite errors. He need not place the church above Scripture. Neither may he imagine that the Holy Ghost preserved the Word only in a handful of copies unknown to the churches which read, confessed, and died for that Word.

Irenaeus is not an authority over Mark. He is a witness to the Mark his churches possessed.

The difference between an argument and a slogan

The claim that “the oldest manuscripts omit the ending” is a slogan when it is made to do work it cannot do. It becomes an argument only when it faces the early evidence which qualifies its force. Irenaeus is not an embarrassing footnote. He is the beginning of the historical case.

The remaining questions are substantial. Did other early writers know the ending? What do the Old Latin and Syriac versions show? What is the precise force of Eusebius’s statement about copies ending at verse 8? Is Jerome an independent witness, or does he reproduce Eusebius? How should lectionary use be weighed? Dean John William Burgon labored over these questions in The Last Twelve Verses of the Gospel According to S. Mark. His work is not inspired, and some of his catalogues and polemical conclusions require checking against later scholarship. But he was right to insist that the question cannot be settled by two manuscripts treated as though they had arrived without a church, a history, or a world around them.⁴

That larger inquiry follows in the next article. For now, the conclusion is secure and narrow: Irenaeus expressly received Mark 16:19 as part of the conclusion of Mark’s Gospel in the second century. Any theory which calls Mark 16:9–20 a late and unauthentic accretion must explain that witness. It may not simply count past it.

Sources cited