THE BOOKS THAT WERE DISPUTED PROVE THE POINT
There were books that took longer to reach universal consensus — Hebrews, James, 2 Peter, 2 and 3 John, Jude, Revelation. Why? Because the early church was applying rigorous apostolic criteria, not institutional preference.
And critically, there were books some wanted to include that were rejected, the Shepherd of Hermas, the Epistle of Barnabas, the Didache. Why were they rejected? Not because Rome said no. But because they failed the apostolicity test, they couldn't be traced to an apostle or apostolic companion with sufficient confidence.
The process was theological and historical, not institutional. The church was asking "did God inspire this?" not "does our institution approve this?"
THE NEW TESTAMENT ITSELF CLAIMS SELF-AUTHENTICATION
The New Testament books claim their own authority internally, they don't appeal to any future council for validation.
Paul opens nearly every letter by establishing his authority directly from Christ:
Galatians 1:1 "Paul, an apostle sent not from men nor by a man, but by Jesus Christ and God the Father."
He explicitly says his authority is NOT from men or human institutions. It comes directly from Christ. A council recognizing that letter centuries later added nothing to its authority, the authority was already established at its origin.
Peter confirmed this principle when he called Paul's letters Scripture in real time, in the first century, without waiting for any council:
2 Peter 3:15-16 "Our dear brother Paul also wrote to you...His letters contain some things that are hard to understand which ignorant and unstable people distort as they do the other Scriptures."
Peter called them Scripture. In the first century. Before any canon council existed. This single verse obliterates the claim that the church gave us the New Testament by selecting its books, because the apostles themselves were already identifying which writings carried scriptural authority.
THE HOLY SPIRIT, NOT THE INSTITUTION, AUTHENTICATED THE CANON
The Holy Spirit who inspired the books is the same Holy Spirit who bears witness to their authority in the hearts of believers.
John 10:27 "My sheep hear my voice."
John 16:13 "When he the Spirit of truth comes he will guide you into all truth."
1 John 2:27 "The anointing you received from him remains in you and you do not need anyone to teach you. But as his anointing teaches you about all things...remain in him."
The early church recognized the canonical books because the Holy Spirit bore witness to their divine origin in the hearts and communities of believers. That recognition happened organically across geographically separated churches who had no institutional connection to Rome, churches in Syria, Egypt, Asia Minor, North Africa, and Gaul were all reading the same books and treating them as authoritative independently.
If the Catholic Church gave us the canon, why did churches with no connection to Rome arrive at essentially the same canon before Rome formally declared it?