Concept

Comma Johanneum

Intro

Open a King James Bible to 1 John 5:7-8 and you find one of the clearest, most explicit Trinitarian sentences in all of Scripture: "For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one." It is so direct that for centuries it served as the go-to proof text for the Trinity.

Open a modern translation (NIV, ESV, NASB, NRSV, CSB, NLT) and the line is either gone or buried in a footnote. What happened?

What happened is one of the most important and most honestly told stories in the history of the Bible's transmission. Textual scholarship across centuries (Catholic, Protestant, secular) has converged on the same conclusion: the Trinitarian clause, called the Comma Johanneum (the "Johannine comma," from the Latin word for a short clause), was not part of John's original letter. It is not in the earliest Greek manuscripts. It is not in any of the great ancient Greek codices (Sinaiticus, Vaticanus, Alexandrinus). It is not in any early translation except a few Old Latin manuscripts where it appears to have started as a marginal Trinitarian note that later got copied into the main text. It is not quoted by the Greek Church Fathers, including the ones writing entire books defending the Trinity, who would absolutely have used it if they had it.

How did it get into the King James Bible? Erasmus, the Dutch scholar who produced the influential 1516 Greek New Testament, did not include the clause because his manuscripts did not contain it. He was attacked by critics. He reportedly said he would include it if anyone could show him even one Greek manuscript containing it. A manuscript was produced (likely written to order, in Dublin, around 1520) and shown to him. He included it in his 1522 third edition under protest. From there it passed into the Textus Receptus, the standard Reformation-era Greek text, and from there into the KJV.

Two important points for apologetics. First, the Trinity does not stand or fall on this verse. The doctrine is grounded in many other clear texts (John 1:1; Matthew 28:19; Philippians 2:6; Colossians 2:9; the deity-of-Christ data; the personhood of the Spirit; the Father-Son-Spirit pattern across the New Testament). Losing one disputed clause does nothing to the case. Second, the honest transparent handling of this clause is actually a credit to Christian textual scholarship. The early Church got along without it; modern critical Bibles flag it; nobody hides what happened.

The page below walks through the manuscript evidence, the Erasmus story, the Reformation history, the King James Only debate, and how to handle the question pastorally when it comes up in conversation.

In full

The disputed Trinitarian clause in 1 John 5:7-8 of the Textus Receptus and the King James / Authorized Version: "For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one." The italicized phrase ("in heaven... and there are three that bear witness in earth") is the comma (Latin: a short clause) named after the apostle. The clause is absent from every Greek manuscript before the late Middle Ages; appears in only a handful of very late Greek manuscripts (most of them with the clause added in the margin in a hand that postdates the main text); is missing from every early translation except the Latin (where it appears in some Old Latin manuscripts and gradually enters the Vulgate tradition); is unattested in the Greek Fathers, including the Greek Fathers who quote the surrounding verses repeatedly in Trinitarian controversy, and was inserted into Erasmus's 1522 third edition of the Greek New Testament under pressure from critics, after which it passed into the Textus Receptus, the Reformation-era vernacular Bibles, and the KJV. Modern critical Greek texts (NA / UBS) and most modern translations (NIV, ESV, NASB, NRSV, CSB, NLT, NET) omit the clause from the main text or relegate it to a footnote; it is defended by a minority of King James Only / Confessional Bibliology advocates and was historically treated as authentic in pre-Vatican-II Roman Catholic teaching.

Core textual claim

The comma is not in the original Greek text of 1 John. Surviving Greek manuscript evidence places the clause's Greek attestation no earlier than the 14th-16th centuries, and even then in only a handful of manuscripts.
The earliest Greek witnesses lack it. Codices Sinaiticus (4th c.), Vaticanus (4th c.), Alexandrinus (5th c.), and every other ancient Greek manuscript of 1 John lack the clause.
The Greek Fathers do not cite it. In centuries of Trinitarian controversy (Athanasius vs Arius; the Cappadocians vs the Eunomians) the Greek-speaking church does not cite the most explicit Trinitarian sentence imaginable, because they did not have it.
The clause's only ancient home is in some Latin witnesses. Probably originating as a marginal Trinitarian gloss on the genuine "three witnesses" (Spirit, water, blood) in Latin manuscripts of the 4th-5th c., the clause migrated into the text in the Old Latin and gradually into the Vulgate.

Manuscript and patristic evidence

Greek manuscript evidence. The comma appears in the Greek text of only about 10 manuscripts (depending on count), all post-12th-c. and most of them with the clause clearly marked as a later addition (margin, asterisk, or scribal note flagging it as taken from the Latin). The principal witnesses:

Minuscule 61 (Codex Montfortianus, c. 1520), the manuscript "produced to order" for Erasmus to compel his insertion; written in Dublin, contains the comma.
Minuscule 629 (14th c.), Latin-Greek bilingual; comma in the Greek conformed to the Latin.
Minuscules 88, 221, 429, 636, 918, 2318, late, with the comma in the margin or as a clearly secondary insertion.
Minuscule 2473 (17th c.) and a few even later manuscripts.

No Greek manuscript dated before the 12th c. contains the comma in the main text. The Aleppo / Eastern lectionary tradition does not contain it. The Bohairic, Sahidic, Syriac (including the Peshitta), Armenian, Georgian, Ethiopian, and Old Slavonic versions all lack it.

Patristic silence. No Greek Father cites the comma in the centuries of Trinitarian controversy in which it would have been the strongest possible proof text. Cyprian (mid-3rd c., Latin) gives the closest pre-conciliar parallel, De Unitate Ecclesiae 6: "of the Father, of the Son, and of the Holy Spirit, it is written, 'And these three are one'", but it is contested whether Cyprian is quoting the comma or giving an allegorical / spiritual reading of the genuine "three witnesses" verse. Augustine, in his commentary on 1 John, does not quote the comma. Jerome's Prologue to the Catholic Epistles (the prologue's authenticity itself disputed) accuses Latin scribes of omitting the comma, implying it was already a contested addition in the late 4th c. The first unambiguous Latin patristic citation as Scripture is in Priscillian (late 4th c.) and in the Liber Apologeticus attributed to him.

Latin manuscript trajectory. The comma appears in some Old Latin manuscripts from the 5th-7th c. onward and progressively in Vulgate manuscripts; by the late Middle Ages it is standard in the Latin tradition, which is why it was felt to be necessary in the Greek when Erasmus's first two editions omitted it.

Erasmus and the Textus Receptus

The story of the comma's entry into the printed Greek New Testament is one of the most-told episodes in textual-critical history.

1516, 1519. Erasmus's first two editions of the Novum Instrumentum omit the comma, on the basis that no Greek manuscript he had seen contained it.
Reaction. Edward Lee and Diego López de Zúñiga (Stunica), among others, attacked Erasmus for his omission, charging him with promoting Arianism by removing the strongest Trinitarian text.
The promise. Erasmus is widely reported (on the testimony of his own correspondence) to have offered to insert the comma if a single Greek manuscript could be produced that contained it.
Codex Montfortianus (Min. 61). A manuscript written in Dublin, c. 1520, apparently produced specifically to meet Erasmus's challenge, was put forward. The translation of the comma in Montfortianus matches Latin word order rather than idiomatic Greek, and lacks the article patterns standard in Greek.
1522. Erasmus, true to his word, inserts the comma in his third edition, but with a long annotation expressing his judgment that the manuscript is suspect and that the comma is probably not original.
Subsequent printed editions. Stephanus (1550), Beza (1565+), and the Elzevirs (1633), the editions that came to be called the Textus Receptus, all include the comma. From the TR it enters Luther's German New Testament (later editions; Luther himself initially excluded it), the KJV (1611), and most other Reformation-era translations.

A. T. Robertson's well-known summary in Word Pictures (1933), quoted in ris3n's notes, describes the insertion as having entered the TR "by the stupidity of Erasmus."

Reception and current status

Roman Catholic. The Pontifical Biblical Commission decreed in 1897 that the comma could not be denied or doubted. This decree was effectively withdrawn in 1927, when the same Commission acknowledged that "biblical criticism" had legitimate reasons for doubt. Modern Catholic Bibles (Jerusalem, NAB, Revised Grail, etc.) omit the comma or relegate it to a footnote; the Vatican's Nova Vulgata (1979) likewise omits it.
Protestant mainstream. Modern critical / eclectic Greek editions (Nestle-Aland 28th ed.; UBS 5th ed.) omit the clause. Modern translations either omit (NIV, ESV, NASB, NRSV, CSB, NLT, NET, Tyndale, REB, NEB) or footnote it as a late insertion.
King James Only / Confessional Bibliology. A minority position, represented in scholarship by E. F. Hills, T. Holland, J. Riddle, D. K. Cloud, and others, defends the comma as authentic, on theological grounds (the providential preservation argument; the theological appropriateness of the witness-pattern; the "witness of the Spirit" warrant) or text-critical grounds (the late Greek manuscripts as preserving a continuously-transmitted minority text; the Latin testimony as evidence; the Cyprian citation as 3rd-c. attestation). Mainstream textual criticism rejects this defense as outweighed by the early Greek and versional silence.
Trinitarian apologetics today. Most modern Trinitarian apologists (Catholic, Reformed, Lutheran, evangelical) do not rely on the comma, treating the cumulative Trinitarian case in Matt 28:19, 2 Cor 13:14, John 14-16, the Christ-hymns, etc. as sufficient.
Oneness Pentecostal critique. Oneness theology has consistently rejected the comma as a late insertion that Trinitarianism leaned on for unwarranted proof; see e.g. ris3n's note which quotes A. T. Robertson at length on the "stupidity of Erasmus" and concludes the comma "has NO WEIGHT in the entire discussion." The point is not just historical but apologetic: Oneness apologists argue the strongest one-verse Trinitarian text is the result of medieval Latin gloss-creep, not apostolic Scripture.

Tensions

Cyprian's De Unitate 6. Whether Cyprian (mid-3rd c., Latin) is quoting the comma or giving a spiritual / allegorical reading of the genuine "Spirit, water, blood" verse remains the principal datum cited by defenders of authenticity. Mainstream scholarship reads Cyprian as the latter; defenders read him as evidence of the comma's mid-3rd-c. circulation.
Jerome's prologue. The Vulgate prologue ascribed to Jerome accuses Latin scribes of removing the comma. If genuine, it is evidence of the comma's contested status in the late 4th c.; most modern textual criticism judges the prologue spurious or pseudo-Jeronymic.
The "providential preservation" argument. Some defenders argue that even if the manuscript evidence is weak, God would have preserved a true Trinitarian sentence in His church's Bible. Critics counter that this argument is theological rather than text-critical and proves too much (it could equally protect any clause in any version).
Practical consequences. If the comma is omitted, the strongest one-verse Trinitarian text vanishes from the Bible. Trinitarian doctrine still rests on the cumulative case; but the single-verse slot is then occupied (at most) by Matt 28:19 (the baptismal formula). Oneness apologists view the comma's removal as confirming that the one-verse Trinitarian case never existed; mainline Trinitarians view it as a textual-critical adjustment that the doctrine survives easily.