In December 1945, near the town of Nag Hammadi in Upper Egypt, a farmer digging for fertilizer struck a sealed jar. Inside were thirteen leather-bound papyrus codices, buried since the fourth century. Among them was the Gospel of Thomas, the Gospel of Philip, and the Apocryphon of John. That last title contains the word we are here to untangle. The difference between apocryphon and apocrypha is not merely grammatical. It marks a boundary between a single hidden book and a class of excluded texts.
Apocryphon (singular) refers to a specific secret or hidden book, often claiming esoteric revelation. Apocrypha (plural) is the collective term for books excluded from the biblical canon. The key fact: apocryphon emphasizes concealment and private revelation, while apocrypha emphasizes ecclesiastical rejection.
Where the Words Come From
Both terms share a Greek root: apokryphos, meaning “hidden” or “secret.” In classical Greek, the word described anything concealed — a buried treasure, a whispered teaching, a mystery cult’s inner doctrine. The Septuagint translators used it for books that were kept from public reading. By the second century CE, Christian writers had split the word into two distinct uses.
The singular apocryphon appears in the titles of Gnostic texts: the Apocryphon of John, the Apocryphon of James, the Apocryphon of Ezekiel (a lost Jewish work). These books present themselves as secret revelations given to a single disciple after the resurrection. The Apocryphon of John, dated to roughly 180 CE, opens with the risen Christ appearing to John in a vision and dictating a cosmology that the orthodox church would later call heresy.
The plural apocrypha entered Latin through Jerome’s Vulgate translation (c. 400 CE). Jerome used it to label books that were read for edification but not used to establish doctrine — what Catholics now call deuterocanonical. Protestants later adopted the term for the entire set of books between the Old and New Testaments that they excluded from the canon: Tobit, Judith, Wisdom of Solomon, Sirach, Baruch, and 1–2 Maccabees.
That history explains why the two words carry different emotional weights. Apocryphon sounds like a discovery. Apocrypha sounds like a rejection.
What the Early Church Actually Did with Hidden Books
The church fathers did not agree on which books were hidden and which were holy. Irenaeus of Lyons, writing Against Heresies around 180 CE, attacked the Valentinian Gnostics for using “apocryphal and spurious writings” — he meant the Apocryphon of John and similar texts. He did not use the word neutrally. For Irenaeus, a hidden book was by definition a dangerous book.
Eusebius of Caesarea, in his Ecclesiastical History (c. 324 CE), created a three-tier classification: accepted books, disputed books (antilegomena), and spurious books (notha). He placed the Apocalypse of Peter and the Shepherd of Hermas in the disputed category. He did not use the word apocrypha systematically. But his scheme became the template for later canon lists.
The Muratorian fragment (c. 170 CE) is the oldest surviving list of New Testament books. It rejects the Shepherd of Hermas for public reading but allows private study. That distinction, public versus private, is the practical meaning of apocrypha for the first four centuries. A book could be true but not read aloud in church. Or it could be false and banned entirely.
The Council of Carthage (397 CE) fixed the New Testament canon for the Latin church at 27 books. After that, the term apocrypha hardened into a label for everything outside the list. For the people who lost those texts, the consequence was real: communities that had used the Gospel of Thomas or the Apocryphon of John were forced to either abandon them or leave the church.
Why a Single Hidden Book Matters More Than a Collection
The distinction between apocryphon and apocrypha is not just about number. It is about genre and function.
An apocryphon is a single work that claims to reveal secret knowledge. It often has a narrative frame: a disciple asks a question, and the risen Christ (or an angel) answers at length. The Apocryphon of John contains a detailed account of the divine realm, the fall of Sophia, the creation of the material world by the demiurge Yaldabaoth, and the path of salvation through gnosis. It is a complete cosmology in one book.
The apocrypha as a category includes many genres: history (1 Maccabees), wisdom literature (Sirach), apocalyptic visions (2 Esdras), additions to existing books (the additions to Daniel). They were excluded for different reasons, late composition, questionable authorship, theological inconsistency with the rest of the canon. They do not form a unified corpus.
For the practitioner, the difference is practical. If you find a single apocryphon, you hold a self-contained revelation. If you find a collection of apocrypha, you hold a library of texts that the church decided were not scripture. The first invites you to read as an initiate. The second invites you to read as a historian.
How the Nag Hammadi Discovery Changed Everything
Before 1945, the word apocryphon was mostly known from heresiologists, church fathers who quoted Gnostic texts only to refute them. The Apocryphon of John existed in fragments quoted by Irenaeus, but no complete copy was known. The Nag Hammadi library changed that. It contained three separate copies of the Apocryphon of John, showing that it was a central text for at least one Gnostic community.
The discovery also revealed that the term apocryphon was used by the Gnostics themselves. The scribes who copied these texts did not think of them as spurious. They thought of them as the true teaching of Christ, hidden from the many and given to the few. The word apocryphon, in their hands, was a badge of honor.
That is the human consequence of the Nag Hammadi find. Before 1945, scholars could only imagine what the Gnostics believed. After 1945, they could read the Gnostics in their own words. The Apocryphon of John turned out to be a sophisticated philosophical work, drawing on Middle Platonism and Jewish mysticism. It was not a crude heresy. It was a rival theology.
What People Get Wrong About Apocrypha and Apocryphon
The most common mistake is treating the two words as interchangeable. “The apocryphon of the Bible” is a phrase that appears in popular writing. It is wrong. The Bible has apocrypha (a collection), not an apocryphon (a single book). The Apocryphon of John is not part of any biblical canon. It is a Gnostic revelation that never pretended to be canonical.
Another misconception: that all apocryphal books are Gnostic. The Old Testament apocrypha are Jewish works from the Second Temple period. They contain no Gnostic cosmology. The Gospel of Thomas is Gnostic-adjacent but not explicitly Valentinian. The Apocalypse of Peter is apocalyptic but not dualistic. The category is broader than any single heresy.
A third error: that the church “banned” the apocrypha. The church did not burn every copy. Many apocryphal books survived in monastic libraries, copied and read by monks who knew they were not scripture. The Shepherd of Hermas was bound into the Codex Sinaiticus (c. 350 CE) alongside the New Testament. It was not banned. It was demoted.
FAQ
Is apocryphon the singular of apocrypha?
Grammatically yes, but in practice the singular apocryphon is reserved for specific Gnostic titles, while apocrypha refers to the general category of non-canonical books.
Are all apocryphal texts Gnostic?
No. The Old Testament apocrypha are Jewish, and many New Testament apocrypha are orthodox in theology but were excluded for other reasons.
Why were apocryphal books excluded from the Bible?
Reasons include late composition, pseudonymous authorship, theological disagreement, and lack of apostolic connection. Each book has its own story.
What is the most famous apocryphon?
The Apocryphon of John, because of its central role in Gnostic theology and its multiple copies at Nag Hammadi. The Gospel of Thomas is more widely known but is not titled an apocryphon.
The Boundary Between Hidden and Rejected
The distinction between apocryphon and apocrypha is not a footnote. It is a reminder that every canon is a decision, and every hidden book is a claim about what knowledge should remain secret. For those who study the boundaries of scripture, the terms are a key to understanding how texts are chosen, hidden, and rediscovered.
Explore our guide to the Gnostic Gospels for a deeper look at the books that never made the cut, and the communities that kept them. For the broader context of esoteric knowledge, see our gnosis hub and the glossary entry on apocrypha.