Who taught Timothy, Titus, Luke? For that matter, who taught Paul? The correct answer is, the Holy Spirit has used those men blessed with the gift of teaching and pastoring to teach them, is that not true?
If 1 John 2:27 forbids learning from men, then did the second generation of believers go against biblical teaching? And if I swear and aver to you that the Holy Spirit has in fact led me and guided me to my conclusions, Ken, through the mentorship of good, godly teachers, in addition to my satisfying myself that what I was hearing was the truth because I could also see it for myself, how do we resolve the fact that He has "given us different revelation"? We know, in fact, He has not. So one of us must be wrong.
As neither of us will be convinced it is himself, what do we then do? Is there fellowship for us, you who believe salvation can be lost and I believing our security in Christ is eternal? Or do we put each other on ignore and pretend the other does not exist? You are not one of these false teachers to whom I refer, Ken. I believe you are wrong, yes, but by the same token your effort is sincere and your demeanor is gentle. So what do we do?
Notice that though they were only taught by those other men if the Holy Spirit, or the Lord Himself guided them to those others. They did not go to them out of their own regard, as is the same standard that is given to us. We are to go by the Holy Spirit's guidance first and foremost, and if the Holy Spirit then guides us to those other people and writings to go by for understanding then that is going by God's will.
I never said 1 John 2:27 forbids learning from men, but what it does do is shows that all truth comes by the Holy Spirit if you are sent to another individual. For even when the original 11 Apostles + Mathias (12th) instructed the likes of Paul, Mark, Luke, Timothy, Barnabas, and others it was the Holy Spirit doing the teaching through them to the others.
Notice now how I said instructed and not taught, as Jesus made it clear none of us are to consider ourselves another's spiritual teacher. For we have one teacher and that is God Himself who's Holy Spirit does the teaching through us, and we just give those instructions by the Spirit to others.
There can still be friendly respectful debating between our sides as the bible states we are to act in the faith, as it is only when the demeaning, belittling, and sarcastic attitudes come out that I do not respect nor does the Spirit of God respect that treatment of others. For we are called to love and be kind to all, not to just those who agree with us !!!
I believe in the doctrine I teach because I have found over 25 scriptures in the NT that sides with it, and I was lead to those scriptures by the Holy Spirit. I know He can not lie or lead a person into false teachings, so what He has shown me can not be a lie. For He has guided my steps to preach and teach in the same manner as Apostle Paul did, as Paul gave most of his warnings to believers.
I wanted to do prophecy study first, but the Holy Spirit said I needed to learn the teachings and warnings of Paul first as that is more important in the faith then knowledge of prophecy is. After 5 years of learning and understanding Paul I was then guided by the Spirit to go to what I originally wanted to learn and that is prophecy.
The Holy Spirit has opened my eyes to a lot of God's truth in the Word, and some of it surprises me how people can so easily miss them as the scripture is clear in what they say. Such as Revelation 2:13 and 13:2 !!!