As previously noted, the story of the Bible is ultimately the account of God’s providence. It is the record of his work throughout history, giving his people his revealed will in written form. Having considered how he inspired his Word, it is now necessary to examine the process of canonization.
The Nature of the Canon
When speaking of the canon of Scripture, the question concerns what belongs in the Bible and what does not. The sixty-six books of Scripture were not the only writings produced during biblical history. Other works circulated, such as the Gospel of Thomas or the Book of Enoch. Paul himself indicates in his correspondence with the Corinthians that he wrote additional letters not preserved in the New Testament. Many writings addressed God, Israel, Christ, and related subjects, yet were never included in the biblical canon.
The canon, therefore, refers specifically to those books that properly belong in the Bible.
The term “canon” derives from a Greek word with roots in a Hebrew term meaning “reed.” A reed plant grows straight, often near water, and in the ancient world it was used as a measuring rod or standard. It could determine whether something was straight or level. In this sense, the canon of Scripture consists of those books that measure up. They meet the standard. They belong within the collection of sacred writings.
This raises an essential question. By what standard were these writings measured? What criteria indicated that a given book belonged in the canon?
The answer centers on divine authorship. God’s people sought to determine whether a writing originated from God. They understood that Scripture came through human authors, yet its ultimate source had to be divine. The decisive question was whether God had spoken in that text. If so, it belonged in the canon. If not, it might still offer value, but it could not be considered Scripture.
A critical distinction must be established at this point. The canon of Scripture was not created by men. It was recognized by men.
In modern discussions, a common theory suggests that a group of individuals, acting behind closed doors, determined which books would be included in the Bible. This theory often assumes ulterior motives, such as shaping the canon to support political power. Popular portrayals, such as those found in The Da Vinci Code by Dan Brown, present the Council of Nicaea as the setting where such decisions were made under the direction of Constantine.
This account lacks historical support. The Council of Nicaea did not address the canon of Scripture. Its purpose was to confront the Arian controversy, which denied Christ’s eternal deity and asserted that he was a created being rather than co-eternal with the Father.
The essential point remains unchanged. The canon of Scripture was not created by men; it was recognized by men. The books of the canon possessed their authority prior to their formal acknowledgment. The church did not confer canonicity but recognized it, functioning under a practical canon long before explicitly defining it.
Consider a federal agent trained to detect counterfeit currency. When presented with two bills, he may determine that one is genuine and the other is not. His judgment does not impart value to the authentic bill. He merely recognizes the value it already possesses, while identifying the counterfeit as lacking that value.
The same principle applies to Scripture. God’s people did not assign authority to certain books. They recognized the authority inherent in writings inspired by God. They identified these texts, received them, and submitted to them because those writings already bore the authority of the Word of God.
The Self-Attesting Nature of Scripture
The central question, then, is how God’s people recognized his Word. What were they looking for that would clearly identify a book as God-breathed?
At the heart of the matter was the Bible’s own self-attestation. This does not mean that each canonical book contains an explicit declaration stating, “This is the Word of God. I belong in the canon.” Rather, each book bears witness to its divine origin. Scripture is self-attesting. It carries within itself the marks of God’s voice. When the Spirit of God is at work within believers, they recognize they are encountering the very words of God.
As Jesus said, “When the Spirit of truth comes, he will guide you into all the truth” (John 16:13). This discernment may be compared to a trained agent who can distinguish genuine currency from counterfeit. Through careful familiarity with the authentic, he recognizes what is real. In a similar way, the Spirit grants God’s people the ability to discern his Word.
Paul expresses this clearly in his letter to the Thessalonians:
We also thank God constantly for this, that when you received the word of God, which you heard from us, you accepted it not as the word of men but as what it really is, the word of God, which is at work in you believers. (1 Thessalonians 2:13)
God not only inspires his Word, but also equips his people to recognize it. As Jesus says, “My sheep hear my voice, and I know them, and they follow me” (John 10:27).
The Beginning of the Canon
With that in mind, where did the canon begin? How did the Bible develop into the sixty-six books we now possess? The question is somewhat misleading. While the book of Job is often considered the oldest written book of the Bible, likely dating to the time of Abraham, the recognition of the biblical canon begins later. It does not begin even in Genesis, but in the middle of Exodus.
In Exodus 20, God gives Moses the Ten Commandments. Later, we read, “[God] gave to Moses, when he had finished speaking with him on Mount Sinai, the two tablets of the testimony [the Ten Commandments], tablets of stone, written with the finger of God” (Exodus 31:18). God himself inscribes the Decalogue on tablets of stone. This is a unique moment in redemptive history. The words are not merely spoken. They are written directly by God.
God then commands Moses to preserve these words. He instructs him to place the tablets in the ark of the covenant. Though the original tablets were broken, the Lord provides replacements, as recorded in Deuteronomy:
At that time, the LORD said to me, “Cut for yourself two tablets of stone like the first, and come up to me on the mountain and make an ark of wood. And I will write on the tablets the words that were on the first tablets that you broke, and you shall put them in the ark.” (Deuteronomy 10:1-2)
Once again, God writes the words and commands that they be placed in the ark.
This marks the first clear instance in Scripture where God not only gives his Word in written form but also explicitly requires its preservation. The medium itself underscores this purpose. Words written in stone are meant to endure. The ark serves as their appointed repository, ensuring their continued presence among the people.
At the very least, the Decalogue is recognized as belonging to the canon. Yet God does not cease speaking. He continues to give his law through Moses. By the time we reach Deuteronomy 31, we read,
When Moses had finished writing the words of this law [that is, God’s law] in a book to the very end, Moses commanded the Levites who carried the ark of the covenant of the LORD, “Take this Book of the Law and put it by the side of the ark of the covenant of the LORD your God.” (Deutoronomy 31:24-26)
Moses completes the writing of the law and commands that it be placed alongside the ark of the covenant.
At this point, the scope of the canon has expanded. It now includes not only the Ten Commandments but the full corpus of the Mosaic law, comprising the five books from Genesis through Deuteronomy. The people of Israel understood that these writings were of divine origin. Though their obedience often lagged behind their knowledge, they recognized that God was speaking through Moses and that these words carried his authority.
This understanding is reinforced in Deuteronomy 4, where God says,
And now, O Israel, listen to the statutes and the rules that I am teaching you, and do them, that you may live, and go in and take possession of the land that the LORD, the God of your fathers, is giving you. You shall not add to the word that I command you, nor take from it, that you may keep the commandments of the LORD your God that I command you. (Deuteronomy 4:1-2)
The command is explicit. The people are not to add to or take away from the Word God has given. As Israel prepares to enter the land of Canaan, they carry with them a defined body of Scripture, guarded by a clear prohibition against human alteration.
Yet the narrative does not end there. After Israel enters the land, additional revelation is given. In Joshua 24, we read,
Joshua wrote these words in the Book of the Law of God. And he took a large stone and set it up there under the terebinth that was by the sanctuary of the LORD. And Joshua said to all the people, “Behold, this stone shall be a witness against us, for it has heard all the words of the LORD that he spoke to us.” (Joshua 24:26-27)
At first glance, this appears to contradict the earlier prohibition. God forbids adding to his Word, and yet Joshua adds to it. The resolution lies in the source of the addition. The prohibition targets human innovation. It does not restrict God himself. As the Author of Scripture, he retains the authority to give further revelation.
Both Joshua and the people recognized that what was being written was not merely human reflection but divine communication. Because these words bore the marks of God’s voice, they were received as Scripture and incorporated into the existing body of the Law.
This pattern continues throughout the Old Testament. As God speaks, his people recognize his voice. What is identified as divine revelation is received, preserved, and added to the canon.
The Structure and Recognition of the Old Testament Canon
Although the details of each book’s inclusion are not always recorded, it is clear that by the first century, God’s people recognized a defined canon. The Jewish historian Flavius Josephus, writing in the latter part of that century, states that the Jews possessed twenty-two books, which were regarded as divine and authoritative.
At first glance, this number appears inconsistent with the thirty-nine books found in the modern Old Testament. The difference, however, lies in the way the Hebrew Scriptures were organized. Several books that are separated in modern Bibles were combined in the Hebrew canon. Samuel, Kings, and Chronicles were each counted as single works. Judges and Ruth were joined, as were Jeremiah and Lamentations, and Ezra and Nehemiah. The Minor Prophets were collected into one unified book. Practical considerations, such as the limitations of scroll length, contributed to this arrangement.
In addition to this structure, the Hebrew Bible was arranged according to three broad categories: the Law, the Prophets, and the Writings. These categories are not based merely on literary genre but on the role each book plays within God’s unfolding revelation. What are often labeled “historical” books are included among the Prophets because they interpret Israel’s history through a covenantal framework. They do not simply recount events but demonstrate how obedience brings blessing and disobedience results in judgment.
Conversely, a book such as Daniel, though prophetic in content, is placed among the Writings due to its literary features and historical context. Written during the Babylonian exile, it contains apocalyptic visions and wisdom elements that distinguish it from earlier prophetic works such as Isaiah or Jeremiah. The Prophets emphasize the enforcement of the covenant within Israel’s history, while the Writings reflect more broadly on life with God.
This threefold division is reflected in the teaching of Jesus. When referring to the Scriptures, he does not use the term “Old Testament,” which had not yet come into use. Instead, he speaks of the Law, the Prophets, and the Psalms, the latter representing the Writings as a whole. As recorded in Luke: “These are my words that I spoke to you while I was still with you, that everything written about me in the Law of Moses and the Prophets and the Psalms must be fulfilled” (Luke 24:44).
The significance of this is substantial. The twenty-two books recognized by Josephus correspond to the same body of Scripture affirmed by Jesus. These were not the only religious writings in circulation. Other works, such as the Book of Enoch, were widely known among the Jewish people between roughly 200 BC and AD 100. Yet such writings were not included in the Hebrew canon. Though they were familiar to many, they were not regarded as divinely inspired. New Testament authors occasionally reference them in the same manner that Paul cites Greek poets, drawing on known material without attributing scriptural authority to it.
The recognition of the canon was not without occasional dispute. Certain books, including Ezekiel, Proverbs, Esther, Song of Solomon, and Ecclesiastes, were questioned by some. These debates, however, arose after these writings had already been broadly received as Scripture. They resemble modern attempts to challenge portions of the New Testament despite long-standing recognition of their authority.
Esther, in particular, drew criticism because it does not explicitly mention God. Nevertheless, the book unmistakably displays his providential hand throughout its narrative. For this reason, and in keeping with the consensus of God’s people, it remained within the canon.
Despite isolated objections, the overwhelming testimony of the Jewish community affirmed these books as the Word of God. More importantly, they were recognized as such by Jesus himself.
The Apocrypha and the Old Testament Canon
Jesus, Flavius Josephus, and the majority of the Jewish people recognized those twenty-two books, and only those twenty-two books, as comprising the Old Testament canon. This point is particularly significant when considering the presence of the Apocrypha in many printed Bibles. The Apocrypha consists of writings produced roughly between 400 BC and AD 100, between the completion of the Old Testament and the beginning of the New Testament.
When Jerome completed his Latin translation of the Bible, later known as the Vulgate, around AD 405, he included the Apocrypha. This translation became the most widely used Bible for more than a millennium. Likewise, the 1611 edition of the King James Bible included these writings. The Roman Catholic Church continues to include the Apocrypha, regarding those books as canonical. However, neither Jesus nor the apostles treated them as Scripture.
The New Testament authors cite the Old Testament with divine authority hundreds of times, yet they never cite the Apocrypha as Scripture. Even among early church writers, there is a consistent effort to distinguish these books from the inspired writings of the Old Testament. Jerome himself maintained this distinction. He referred to the recognized Scriptures as “books of the canon,” while describing the Apocrypha as “books of the church.” In his view, they could serve a useful role, particularly in conveying historical information, but they were not to function as the foundation for doctrine.
It was not until 1546, at the Council of Trent, that the Roman Catholic Church formally declared the Apocrypha to be canonical. Prior to that point, while these books were often read and circulated, they were not universally regarded as Scripture.
Josephus provides important historical insight into this issue. He notes that writings produced after the time of Artaxerxes, referring to what is now called the Apocrypha, were not considered to be of equal authority to the earlier records. The reason, he explains, is that there had been no recognized succession of prophets during that period.
This reflects a broader conviction among the Jewish people. With the cessation of prophetic revelation, the Old Testament canon was understood to be complete. Although Jesus does not articulate this principle in those exact terms, his affirmation of the established canon corresponds precisely to those same twenty-two books.
Some confusion regarding the Apocrypha arose due to changes in how texts were transmitted. The transition from scrolls to codices, an early form of the book, allowed multiple writings to be compiled into a single volume. This development offered practical advantages, but it also made it possible to include non-canonical works alongside canonical ones. When the Apocrypha appeared in the same codices as the Old Testament, some readers naturally assumed that all included writings carried equal authority.
Jerome himself initially shared this assumption. However, after relocating to Bethlehem and studying Hebrew manuscripts, he recognized that the Jewish community did not accept the Apocrypha as part of the canon. Although he continued to include these books in his translation, he made clear in his prefaces that he did not regard them as Scripture.
Apostolic Authority and the New Testament
With the Old Testament canon recognized as complete, the question naturally arises: what would lead an orthodox Jew to believe that additional Scripture could be given? The Apocrypha had already been rejected. What, then, would justify the conclusion that God was once again speaking in a way that would expand the canon?
Such a development would require a decisive act of God within redemptive history. That act was the coming of the long-awaited Messiah.
Yet a difficulty remains. Even if one accepted that Jesus was the Messiah, he did not produce written works to be added to the canon. Apart from the brief account of his writing on the ground in John 8, there is no record of him committing anything to writing. If the Messiah himself did not write Scripture, on what basis could the writings of others be received as authoritative? How could additional books be accepted after centuries of a closed canon?
The answer lies in the authority Christ conferred upon his apostles. Throughout his ministry, he established and prepared them to serve as his authorized representatives, equipping them to speak and, ultimately, to write with his authority.
In Matthew, Jesus says: “Whoever receives you [the apostles] receives me, and whoever receives me receives him who sent me” (Matthew 10:44). The reception of the apostles is equated with the reception of Christ himself, and by extension, the Father who sent him. This establishes a direct line of authority.
In John 14, he further promises,
These things I have spoken to you while I am still with you. But the Helper, the Holy Spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you. (John 14:25-26)
Here, the role of the Holy Spirit is made explicit. The Spirit would teach the apostles and bring to their remembrance all that Christ had said. This was not a general promise to all believers, but a specific provision for those who would bear authoritative witness to Christ.
Their role as eyewitnesses is also emphasized. In Luke 24, after opening their minds to understand the Scriptures, Jesus says,
Thus it is written, that the Christ should suffer and on the third day rise from the dead, and that repentance for the forgiveness of sins should be proclaimed in his name to all nations, beginning from Jerusalem. You are witnesses of these things. And behold, I am sending the promise of my Father upon you. (Luke 24:46-49)
The apostles are commissioned as witnesses to the fulfillment of God’s redemptive plan and are promised divine empowerment for this task.
In this way, while the Messiah did not personally write Scripture, he appointed, authorized, and equipped the apostles to do so on his behalf. In certain cases, this authority extended to close associates such as Mark and Luke, whose writings were received under apostolic oversight. Through this divinely established means, the canon of Scripture was extended in continuity with God’s prior revelation.
The Recognition of the New Testament Canon
Subcollections of the New Testament began to function as recognized units of Scripture even before the entire New Testament was complete. The four Gospels, for example, were widely circulated and treated as authoritative while other books were still being written. By approximately AD 110, figures such as Ignatius of Antioch and Polycarp were already quoting the Gospels as authoritative texts. Within a few decades, Irenaeus could assert that the number of Gospels was fixed at four. Even prior to his writing, a harmony of the four Gospels had been produced, demonstrating how quickly the church recognized and received them as canonical.
The reception of Paul’s writings follows a similar pattern, though his personal history initially raised questions. After his conversion, some within the church hesitated to accept him. Nevertheless, his letters came to be widely recognized as authoritative. This recognition was not delayed until a later period but occurred during the apostolic age itself.
Peter provides decisive testimony on this matter. In his second epistle, he writes,
Count the patience of our Lord as salvation, just as our beloved brother Paul also wrote to you according to the wisdom given him, as he does in all his letters when he speaks in them of these matters. There are some things in them [that is, Paul’s letters] that are hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other Scriptures. (2 Peter 3:15-16)
In this passage, Peter places Paul’s letters alongside “the other Scriptures,” using terminology consistently reserved for divinely inspired writings. This indicates that Paul’s epistles were already being received and classified as Scripture within the lifetime of the apostles.
Chronologically, this is significant. Paul’s letters appear to have been completed by around AD 68, while 2 Peter is commonly dated to the following decades. This means that the recognition of Paul’s writings as Scripture was not a later ecclesiastical development but an early and public acknowledgment.
Not all New Testament books, however, were received at the same pace. Several writings were gradually recognized, including Hebrews, James, 2 Peter, 2 John, 3 John, Jude, and Revelation. The hesitations surrounding these books were varied. Questions about authorship affected Hebrews, since the writer does not identify himself. Concerns about doctrinal consistency led some to scrutinize James in relation to Paul’s teaching on justification. The brevity of 2 and 3 John prompted uncertainty about their inclusion. Revelation’s apocalyptic imagery made some cautious in their assessment.
Second Peter, in particular, drew scrutiny due to its stylistic differences from 1 Peter. The third-century theologian Origen acknowledged this tension, noting that while one of Peter’s epistles was universally accepted, the second was disputed. The difference in Greek style, however, can be reasonably explained by the use of a scribe or by variation in context and composition.
These discussions, while they may appear minor, demonstrate the care exercised by the early church. The inclusion of a book in the canon was not taken lightly. The church did not accept writings merely because they claimed apostolic origin. Each text was examined to determine whether it truly bore the marks of divine inspiration. The guiding principle remained consistent with the earlier command: “You shall not add to the word that I command you” (Deuteronomy 4:2).
When the testimony of early Christian writers is considered, it becomes evident that most of the New Testament books were recognized by the end of the second century. By the close of the fourth century, all twenty-seven books were clearly identified as canonical. They were listed together, read publicly, and used in the regular life of the church.
As with the Old Testament, the process did not involve a sudden or external imposition. No definitive list descended in a single moment. Rather, the providence of God guided the church over time. Through recognition, use, and careful discernment, these twenty-seven books were identified as the Word of God, while others were set aside. Though the process unfolded gradually, it culminated in a settled, unified acknowledgment of the New Testament canon.
The Closure of the Canon
A final question may be considered. Suppose an archaeologist were to discover an ancient letter, purportedly written by the apostle Paul. Should such a document be added to the canon?
The answer is no.
The opening of Hebrews provides a necessary framework:
Long ago, at many times and in many ways, God spoke to our fathers by the prophets, but in these last days he has spoken to us by his Son, whom he appointed the heir of all things, through whom also he created the world. (Hebrews 1:1-2)
God spoke in various ways through the prophets, but in these last days he has spoken definitively through his Son. This establishes a climactic moment in redemptive history. The coming of Christ marks the culmination of divine revelation.
As previously noted, the Old Testament canon was understood to be complete when prophetic revelation ceased. That situation changed only with the arrival of the Messiah. Although Christ himself did not write, he authorized his apostles to speak and write on his behalf. Through them, the New Testament was given.
With the conclusion of the apostolic era, however, that unique authority has ceased. Those commissioned witnesses are no longer present. The Son is not continuing to speak through new revelatory agents. Consequently, no one today possesses the authority to add to the canon.
The closing words of the New Testament reinforce this point:
I warn everyone who hears the words of the prophecy of this book: if anyone adds to them, God will add to him the plagues described in this book, and if anyone takes away from the words of the book of this prophecy, God will take away his share in the tree of life and in the holy city, which are described in this book. (Revelation 22:18-19)
While the warning is directed specifically to the book of Revelation, its placement at the conclusion of the canon is fitting. Just as the Old Testament was regarded as complete until the next decisive act of God, so the New Testament stands complete in anticipation of the next and final event in redemptive history.
That event is the return of Christ. Until then, the canon remains closed.
