The New Testament canon—the 27 books Christians recognize today—was not arbitrarily chosen by church leaders centuries later. Instead, it was recognized based on clear criteria.
First, apostolic authority was central. Books had to be written by apostles (like Matthew, John, Paul) or their close associates (like Mark with Peter, Luke with Paul). This ensured they were rooted in eyewitness testimony.
Second, orthodoxy mattered. A text had to agree with the teaching of Jesus and the apostles. Writings that contradicted core truths about Christ’s death and resurrection were rejected.
Third, widespread usage was considered. Books used consistently in churches across the Roman Empire were recognized as inspired. For example, Paul’s letters circulated widely, and the Gospels were read in worship from early times.
By the second century, most of the New Testament was already accepted. Lists like the Muratorian Canon (c. AD 170) confirm this. Councils in the fourth century did not invent the canon but formally recognized what the church had long acknowledged.
Christians believe God guided this process. The canon is not a human invention but a recognition of the books God inspired and preserved for His people.