Phil asked, "Do you believe it to be the only word, the final word of God to us? Could you find the way to your personal salvation in the Bible alone?"
Gunslinger replied, "I would have to disagree with this assessment. Why does the Bible have to be the only set of scriptures for our benefit?"
Phil replies, "Lets tackle this question first. "You asked, "Why does the Bible have to be the only set of scriptures for our benefit?" Now that is a good question, so I would reply, "Why not?"
If we were to go out into the religious world and ask every/any leader of every/any denomination, "Is your Catechism; is your, Book of Mormon; is your Watchtower; is your Koran; is your book on Scientology; is your expositor; is your books on New Age; etc., God inspired? I am sure everyone of them would say yes. Of course there going to say yes. And to each of these, I would ask them what I had asked you earlier.
How can anyone justify their claims of adding these new teachings when Scripture states, Rev.22:18-19, we are not to add, or subtract from this book, meaning the Bible. If anyone does add, or take away, they will suffer the curses of God. How does anyone get around these verses.
Is God the author of confusion? Does he say one thing and mean another?
When we read the superscript, and the first verse of Revelation, we see,
"The Revelation of Jesus Christ, which God (the Father) gave him." These words clarify with the article "The," that this is it, there will be no other revelation coming from the Father concerning His Son, to anyone. And it closes with the instruction of not to add, or take away.
What distinguishes the N.T. gospel from others books, or documents? Each of these N.T. letters, was written by men, including Paul who were eye witnesses to Jesus Christ having been raised from the dead. This distinguishes true apostiles from those apostiles, who falsely claim to be apostiles.
John's Revelation came from the Father, to His Son, to John. This supports, Heb.1:1, "God (the Father) at sundry (various) times and in divers (many way) spake in time past unto the fathers by the prophets. Hath in these last days spoken unto us by His Son (Jesus,) when He (the Father) hath appointed heir of all things."
These self appointed apostiles, and prophets are false, each having, and teaching another gospel.
As far as the 4th century goes, there were individual letters circulating, as well as oral communications, by the apostles themselves, and those who knew them. The apostles wrote to the Jews, Paul wrote to the churches in Corinth, Philippi, Ephesis, Rome. And I would suppose copies were made, and sent to the many churches over the centuries.
They had to be, this is why we have them today. Gathering them all together later, has no bearing whatsoever that they were/had not been circulated in the Christian community of that day. Also, most Christian's were being hunted down by the authorities. Many dispersed to other countries, and therefore spreading the good news of Jesus Christ.