“The New Testament writers recognized that their writing were part of Scripture so Paul’s description of “all scripture” would include all the New Testament canon.”
1 Peter 3:15-6
“But in your hearts set apart Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect, 16keeping a clear conscience, so that those who speak maliciously against your good behavior in Christ may be ashamed of their slander.”
I was expecting proof text, not an admonition.
I don’t know how I can make it any clearer. Peter, Paul, and the synoptics had no concept of a ‘canon’, per se. John wasn’t even written until 30 years after all the rest. The only one who would have any concept of a canon would be John, not the other synoptics, and particularly not Peter or Paul, as none of the synoptics had been written when the epistles were written.
The Canon was not set until St. Jerome did so with the Vulgate. While it is true that the NT was written in the original books, in Greek and Aramaic, it’s also true that the first time they were put together in a bible is in the Vulgate, and that was several hundred years after they were written. Until then, the NT canon had regional variations.
Jerome's work wasn’t finished till near 400 A.D. and long before what was recognized as Scripture is clear from what was quoted as authentic by writers and lists such as the Muratorian fragment.
While some books not widely circulated may have been more lately accepted amongst the Christian community, by 200 A.D. what is now called the New Testament was largely recognized as Scripture and needed no council to make it official.
Not to be overlooked is the leading of God's spirit as He has preserved His word and caused the false books like the Apocrypha to be weeded out.
I think the original poster meant 2 Peter 3:15-16:
15And count the patience of our Lord as salvation, just as our beloved brother Paul also wrote to you according to the wisdom given him, 16as he does in all his letters when he speaks in them of these matters. There are some things in them that are hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other Scriptures.
Note the last part: "as they do the other Scripture." If you are Roman Catholic, I would assume that the words of Peter would carry a lot of weight with you.
The Canon still has variations, including between Protestant and Catholic. However, the large majority of the NT was accepted as scripture almost as soon as it was written. Folks did NOT wait for a church council to use the Gospels or Paul’s letters or 1 Peter as scripture.