Actually, Athanasius affirmed the 27 books of the NT canon by name that are the same as the ones we have today, before the Councils met.
Not only the 27 books but the Epistle of Barnabas and the Shepherd of Hermas. So 29 books.
So, did Cyril of Jerusalem, & even Eusebius who quoted earlier sources.
Here is Cyril’s Catechetical lecture on divine scripture. Do you count 27 books?
- Then of the New Testament there are the four Gospels only, for the rest have false titles 10 and are mischievous. The Manichaeans also wrote a Gospel according to Thomas, which being tinctured with the fragrance of the evangelic title corrupts the souls of the simple sort. Receive also the Acts of the Twelve Apostles; and in addition to these the seven Catholic Epistles of James, Peter, John, and Jude; and as a seal upon them all, and the last work of the disciples, the fourteen Epistles of Paul . 11 But let all the rest be put aside in a secondary rank. And whatever books are not read in Churches, these read not even by thyself, as thou hast heard me say. Thus much of these subjects.
What is more important to note here is not the list of the books, rather, a key criteria is that the books need to be read in Churches for them to be canonical. Of course, he is speaking about the Catholic Church and the Catholic Mass. There was no other Church, and everyone celebrated the Mass inclusive of receiving the actual body, blood, soul and divinity of Christ in the Eucharist.
So if you trust Cyril got it right on the canon of scripture (or close), then you should trust his Words below on the Eucharist:
“Having learn these things, and been fully assured that the seeming bread is not bread, though sensible to taste, but the Body of Christ; and that the seeming wine is not wine, though the taste will have it so, but the Blood of Christ; and that of this David sung of old, saying, And bread strengtheneth man’s heart, to make his face to shine with oil, ‘strengthen thou thine heart,’ by partaking thereof as spiritual, and “make the face of thy soul to shine.”” Cyril of Jerusalem, Catechetical Lectures, XXII:8 (c. A.D. 350).
However, we can go earlier than that, since it’s believed that the slave Onesimus mentioned in Paul’s epistle to Philemon is the same Onesimus who was the later bishop of Ephesus that Ignatius wrote to, who F.F. Bruce suggested that he was instrumental in collecting & preserving the epistles of Paul. This would certainly affirm Peter’s earlier affirmation of all of Paul’s epistles as “Scripture” (2 Peter 3:15-16),
OK.
which Paul himself calls Scripture “Inspired,” or “God-breathed” (2 Timothy 3:16).
Paul is speaking of the Old Testament in this verse as the proceeding verses he is talking of the scriptures that they have known since childhood.
14 But you must continue in the things which you have learned and been assured of, knowing from whom you have learned them, 15 and that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus.
And Paul himself quotes Luke 10:7 & calls it “Scripture” (1 Timothy 5:18).
No he is referring back to Deuteronomy 25:4. Again, the Old Testament.
1 Timothy 5:18
18 for the scripture says, “You shall not muzzle an ox when it is treading out the grain,” and, “The laborer deserves his wages.”
Deut 25:4
“You shall not muzzle an ox when it treads out the grain.
So, by mid-FIRST century, when most of the apostles, like Peter & Paul were still alive, most of the New Testament had been written & recognized by the FIRST century Church as being Inspired Scripture.
So, by the second century, these same books, as well as the later epistles, were also recognized, & later reaffirmed by later ECF’s (like those mentioned above) long before the Councils met.
Go back to your sources and provide link that clearly lists a canon of scripture prior to 382 ad that matches what you have today.
Interesting though that you keep referring to this Church that determined scripture. We Catholics agree with that part. We can also read - from the same people that wrote, guarded and copied the New Testament scripture, how they referred to this Church. St. Ignatius was an ECF and a disciple of St. John (who himself wrote scripture.

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“See that ye all follow the bishop, even as Christ Jesus does the Father, and the presbytery as ye would the apostles. Do ye also reverence the deacons, as those that carry out the appointment of God. Let no man do anything connected with the Church without the bishop.
Let that be deemed a proper Eucharist, which is [administered] either by the bishop, or by one to whom he has entrusted it. Wherever the bishop shall appear, there let the multitude also be; by the bishop, or by one to whom he has entrusted it.
Wherever the bishop shall appear, there let the multitude also be; even as, wherever Jesus Christ is, there is the Catholic Church.” Ignatius of Antioch, Epistle to the Smyrneans, 8:2 (c. A.D. 110).
It’s very inconsistent to trust this Catholic Church on determining Scripture (inerrant it was in doing so) but reject its teaching on faith and morals.