This is the Dan Brown myth: emperor Constantine and bishops voting on which books to include, suppressing other gospels for political reasons. It's a great novel premise. It's not history.
What Nicaea actually did
The Council of Nicaea (325) addressed the Arian controversy — whether Christ is fully God (homoousios with the Father) or a created being. The minutes do not discuss the canon. Not one canon list comes from Nicaea.
How the canon was actually formed
By the early 2nd century, the four Gospels and Paul's letters were already being read in churches and quoted as Scripture. The Muratorian Fragment (c. 170 A.D.) lists most of the New Testament. Irenaeus (c. 180) names the four Gospels as fixed and irreplaceable. By the time formal lists appear (Athanasius's Festal Letter, 367; the Councils of Hippo 393 and Carthage 397), they are ratifying, not deciding.
Why these 27 books?
Three criteria the early Church applied:
- Apostolic origin — written by an apostle or close associate (e.g., Mark with Peter, Luke with Paul).
- Universal use — accepted across the whole Church, not one region only.
- Orthodox content — consistent with the rule of faith handed down from the apostles.
What about the "lost gospels"?
The Gospel of Thomas, Judas, Mary, etc. were known to the early Church and rejected — not because they were politically inconvenient, but because they were late (mostly 2nd–4th century), Gnostic in theology (rejecting the goodness of the body and the Creator), and lacked apostolic provenance. They are interesting historical documents. They are not suppressed Christianity.
The Orthodox lens
The Orthodox Church does not derive its faith from a book and then build a Church around it. The order is the reverse: the Church, led by the Spirit, recognized which writings expressed the apostolic faith it had already received. The canon is the Church's discernment of its own memory.
A pastoral word
If a TikTok video or pop-history book shook your confidence in the Bible, take heart — actual textual scholars (even skeptical ones like Bruce Metzger and Bart Ehrman) reject the "Constantine invented the canon" myth. The 27 books you hold were already cherished by Christians dying in arenas long before any emperor noticed.