It is my understanding that Luther “submitted himself” to the gospels. Thereby the gospel is the “arbiter” if you will of truth. My point is simply this... Based on this idea... One can give 20 people the same bible, and all 20 can come up with a different meaning of similar texts. In this situation, when one simply referees back to the scripture, it becomes a circular problem. I may read the scripture, my interpretation of it may be wrong, but it’s my interpretation, and no one else can tell me that it is wrong, because the scripture is held as the standard. This of course coming from his personal issues with the church at the time... He rejected the church’s authority to claim “authority” over the interpretation of the scriptures... Does any of this make sense? Truly I am not trying to squabble, but in 50 years I have not found a sensible logical answer to the problem of solo scriptura ... Or for that matter, sola fides...
The Apostle Paul answered your question/dilemma in Philippians 3:
15 Let us therefore, as many as are perfect, have this attitude; and if in anything you have a different attitude, God will reveal that also to you; 16 however, let us keep living by that same standard to which we have attained.
Please note Paul’s words carefully. He does not say, if any have a different attitude, assembly-authority [which is a more accurate translation of the Greek than,’church-authority’] will resolve the problem. He says, “God will reveal that also to you.”
Two points. God WILL reveal His truths to us if we seek them. This promise is made repeatedly in Scripture. However, (point Two), some do not desire God’s truth. They are too mired in one error or another to wholly and prayerfully submit to God’s guidance. That doesn’t invalidate Paul’s prescription for acquiring wisdom and insights; it simply explains why errors persist.
You left out sola ecclesia