How Was the Bible Canonized? Who Decided Which Books Count

“Who decided what goes in the Bible? Could someone have removed the books they disliked?” It is a fair question. The answer is duller than the suspicion and sturdier than it too: no council ever voted the Bible into existence. The canon formed by recognition, over centuries.

What canon means

Canon originally meant a measuring rod. It does not describe an approved reading list so much as the books that carried their own authority and were recognised, again and again, by the communities reading them. The church’s role looks more like acknowledgement than authorisation — you cannot decide which rock is gold, only recognise it.

The Old Testament: settled before Jesus

By the time of Jesus the Jewish scriptures were effectively fixed. He referred to the whole of it as “the law of Moses, and the prophets, and the psalms” — the standard threefold division of his day. Jesus never disputed the extent of the Old Testament. He argued with the Pharisees about a great deal; never about which books counted.

The New Testament: used first, listed later

The order matters: there was no list that then produced usage — there was usage, and the lists came after. By the early second century the four Gospels and Paul’s letters were being read aloud in churches across the empire. The earliest surviving list, the Muratorian Fragment of around AD 170, already contains most of the New Testament.

The three tests

Apostolicity — written by an apostle or by someone close to one (Mark to Peter, Luke to Paul). Universality — received widely rather than in one region. Consistency — in accord with the apostolic teaching already established.

Which books were argued over

Some genuinely were. Hebrews, because nobody could name its author; James, for its stress on works; Revelation, for its difficulty. Meanwhile the Shepherd of Hermas and 1 Clement were respected but not received. That care is the point — a canon thrown together casually would have produced no arguments at all.

My sheep hear my voice, and I know them, and they follow me.John 10:27 (KJV)

What the councils actually did

In AD 367 Athanasius listed exactly the 27 New Testament books we have; the Council of Carthage confirmed it in 397. These are the end of the process, not the beginning — they recorded a consensus the churches had already reached in practice.

To see how the New Testament writers treated scripture, read 2 Peter 3 in the BiblePro app, where Peter sets Paul’s letters beside “the other scriptures”; then use AI search to trace every “it is written”. And do look for a local church to read alongside others.