You are completely missing my point here. Peter and the 11 were given miracles, signs, and wonders as part of their Great Commission, the Gospel of the Kingdom they were charged with. They spoke. They wrote. Their actions and words concerned Christ’s life on this earth up to the point He was received out of their sight (The Resurrection, Acts Chapter 1.) Their message concerned what CHRIST formed when He was walking among men. A Kingdom of believers who were formed because they accepted Christ as their promised Messiah, to rule and reign from Jerusalem, whereby salvation would then be sent to the gentiles. The Law.
There was another Apostle, Paul, that was called, saved and sent AFTER Christ was resurrected. HIS message and commission concerned Christ AFTER His Resurrection; what things He continued to do AFTER He was Resurrected. These things were imparted to HIM by DIRECT visions and revelations from the risen Christ. Paul spoke and wrote these things diwn, AS THE HOLY SPIRIT MOVED HIM, JUST AS THE HOLY SPIRIT MOVED THOSE WHO WROTE THE OTHER BOOKS OF THE NT. Paul’s message concerned what Christ was doing from Heaven- forming a Body of believers, made up of those saved by the Finished Work of Christ on their behalf. Based on nothing but faith and GRACE. Without the LAW. Paul performed God given signs and miracles, also. As a SIGN that he was indeed sent by God. Peter and the rest of the Apostles were weary of him at first. I’m sure you’ve read in one of Peter’s Letters that some of the things Paul wrote were “hard to understand”.
I’m saying all this because while these outward shows were going on they were also writing to their followers, writing of these things.
Peter and the 11 wrote concerning Christ’s life while He was on Earth. Paul wrote of Christ’s resurrected life since He’s been in Heaven.
If your church focuses on His earthly ministry and a Kingdom message, you are only following just one half of His life. He has ANOTHER life after His Resurrection. You will find out all about that in Romans through Philemon.
One more thing: Christ is not through with His Kingdom message. It has been temporarily set aside while He is forming the Body of Christ. That is what Romans through Philemon is all about. Once the Body is complete we will be removed at the Rapture at which time the Kingdom message will begin again until it’s fruition, at the Second Coming of Christ. That is what the Old Testament and Hebrews through Revelation are all about.
If Christianity began with a book (as Mosaic Law began with the receipt of the Ten Commandments or Mormonism began with the Book of Mormon, for example), then those that stake everything on that book would a) be correct to do so, and b) be correct in calling out those who saw the book as one of three sources of authority.
But because Christianity didn't begin with a book (but with a God-Man who instituted a church and then appointed one of His followers as its leader), and because the Book that Christians refer to as a pillar of authority came out several decades after the God-Man left this earth, we know that the Book simply cannot be the only source of authority, unless we believe that all who lived and died during the time after the God-Man left and before the Book appeared were all damned, and for nothing more than not having had access to this very important Book.
So our only other option is to consider that while the Book may be Very Important, there may be other means of passing on the very critical information we need to save our souls.
The hurdle that the Sola Scriptura folks cannot overcome is this period of time when Christians passed on the Faith to their offspring and to others without the benefit of the Bible. (It's a matter of logic: If you tell me you cannot know everything about a subject without having a manual and I tell you that I am in the process of writing the manual and I will simply teach you everything that the manual confirms by using both written and verbal communication, then the manual simply isn't the only means available of passing on information.)
You provide examples of the Church passing on the Faith through the Magisterium (one of the pillars of authority that the Catholic Church recognizes), but you don't call it that. These men were teaching the Faith through writings as well as through locution; the Bible hadn't even been written. (That they often performed signs and wonders doesn't add or detract from their authority to teach.)