The very nature of Christian conversion establishes the primacy of conscience. During conversion, which can transpire in a matter of seconds if the gospel is preached powerfully with great anointing/unction, agnostics and atheists alike draw four major religious conclusions:
(1) Jesus is God.
(2) Jesus died for my sins.
(3) Jesus plans to take me to heaven forever.
(4) The Bible is His written Word.
How is this possible? Blind faith? But blind faith is not wise as such practice would lead you to accept any and every false religion presented to you. Calvin had a better answer named the Inward Witness. Probably 99% of evangelical theologians have (rightly) agreed with him since then.
How does it work? Simple. As Calvin stated, it boils down to a feeling of certainty. The Holy Spirit operates in in the heart or mind persuasively, causing the unbeliever to begin feeling certain of the gospel. We say that the Holy Spirit convicts (convinces) the unbeliever. This is a direct revelation. This confirms:
(A) That conscience (feelings of certainty) are authoritative. Recall that conversion is not a phenomenon of your past, you in fact DAILY assert those 4 conclusions. If your original authority (feelings of certainty) has been impugned, then you should recant those 4 beliefs. In other words, the Inward Witness is, on daily basis, the rock upholding our faith, and therefore feelings of certainty are STILL a final authority in our lives long after initial conversion.
(B) Direct revelation - not biblical exegesis - is the foundation of the church. Stated succinctly, Christ Himself - not His written texts - is the foundation of the church.
(C) Exegesis is NOT preeminent in conversion. Sola Scriptura demands exegetical proof for any conclusion drawn. The problem is that Greek, for example, is too complex for quick proofs. A single Greek verb has over one hundred forms in its conjugation, as opposed to a simple language like English (say 4 or 5 forms). Without spending several years at seminary mastering Hebrew and Greek,therefore, how can I really claim to have 'proof'? During conversion, the convert reaches the 4 conclusions above without the skills needed to mount an exegetical proof. As Calvin noted, the Inward Witness (feelings of certainly) afford the only plausible explanation.
I still think all of this is an unnecessary dichotomy.
Your example is a good example.
In your example you've asserted that (A) the gospel was preached with great anointing. I call up Romans 10:17 which explicitly says the Word of God creates the 'hearing' necessary for faith.
Both the Word and the Spirit work together, or are two sides of the same coin, working mysteriously in the believer to justify and sanctify. The Spirit uses the Word, and the Word has the Spirit.
Again, (B) is incorrect in your premise. It doesn't matter if some Protestants IMPLY that scripture is the foundation of the church. That is proved wrong by the very scripture's words that those protestants attest to be the final authority. Christ is the foundation of the church, as you rightly state, and any Sola-Scriptura believer will attest to that fact. Any Protestant believer who implies or teaches that scripture is the foundation of the Church is not being faithful even to the doctrine of sola scriptura.
(C) is incorrect by your example. Your example includes the preaching of the gospel with 'great anointing / unction'. The gospel is an exegesis of scripture - of the teaching of the apostles that we are devoted to (or at least the early church was in Acts 2:42). 'Great anointing / unction' would include some sort of spirit-led clarification of the gospel to the intended audience ('exegesis' means to explain and clarify the text). In other words, exegesis on some level is required for preaching.
Exegesis is not usually the task of the hearer but of the preacher. Some sort of exegesis is required from the preacher to clarify to the hearer. This doesn't require years at seminary, and I agree to that. It doesn't even necessarily require knowledge of greek words etc. But it certainly requires the Bible in some part of the equation.
Here's the problem with this post (and the other). You're critiquing a Biblicism prevalent (it seems) in certain quarters of America, and blaming an inappropriate negation of the power of the Spirit (and the direct revelation of the Spirit) on the doctrine of Sola Scriptura. Just because some Protestant groups have gone extreme on the Bible doesn't mean the doctrine of Sola Scriptura is itself faulty.
One can attest to scripture being the final authority while
also attesting to direct revelation from the Holy Spirit and direct experience of the divine. As I do.
Spirit does not trump Word, and Word does not trump Spirit. There is no need to create a dichotomy between the two. Any attempt to do so always veers off into unhealthy directions. To make your own conscience your final authority is neither right nor safe, but to ignore it is neither right or safe either. An aeroplane needs two wings to fly - likewise, we need both Word and Spirit. And this is what any good reformationist knew and taught in their day.