Being in communion with the One True Church. His opinion on Scripture is no more valid than yours or mine. That is the fatal flaw of Sola scriptura-no authority, everyone gets to draw their own conclusions and if they don’t find agreement start their own denomination
Actually I sort of disagree on the application of sola scriptura on authority. It is selective. If Protestant go strictly by the book, pun intended, they would have taken all their disputes to the Catholic Church in the 15th century. It said so in the Bible! Take it to the Church. But no , let us splinter off.
Ok, let say they are already out and no way will they submit to the RCC. When they have a dispute on doctrine, they don’t really take it to their church. They splinter off, again! And again! And again! Now they are 33,000 strong. Not one will ever take it to the church, whatever the denomination. So how come Sola Scriptura didn’t apply when it comes to splitting? Don’t they know the Bible? Aren’t they “experts”? Or is it “inconvenient” to go to the church to settle the disputes? Some claim they do. They put it to a vote. And again. And again. Until the losing party eventually win and the new doctrine becomes irreversible. And grumpy folks just go off and do something traditional, i.e., splinter off or join another church more to their liking. None of these actions are ever sanctioned by the HS. Democracy wins, HS lose. Democracy empowers. I decide. Which seems to be opposed to the Christian faith. When A&E , decided to empower themselves, you see the results. When Lucifer decided to empower himself, you see the results. When Reformers empowered themselves, you see the results.
So on the topic of experts, who or what is an expert? Is it one that knows the Bible by heart? Is it one that can create doctrine by weaving certain chapters/verses together while ignoring conflicting verses? Can an expert who belongs to a church that can change its doctrine by popular vote be properly called an expert if tomorrow what he believes is negated by popular vote? Example, an expert believes in a set of doctrines of his church but which was removed by popular vote tomorrow, can he still be an expert of that faith? What does it mean to be an expert in a constantly changing environment? One who can keep up with the times such as in science and IT or one that stays true to the founder’s intention?
Can a Buddhist or a Muslim who know your Holy Books inside/out while not professing to be a believer be an expert? If yes/no, why yes or no? This person may out speak, out write you , out debate you but he is not a Christian.
In my mind, an expert knows better the intention of the founder. The mind of God so to speak. He may or may not be able to follow the teachings but he can explain what God’s intention was, what God wants us to do. And he can do it holistically, total picture, helicopter view. Everything ties. And he can only do it as a baptized Christian, one who has internalized the faith and not merely as an academic discipline. For example, Catholics have the Sacraments. Take the Eucharist. One can technically study as much as they want about the Eucharist, but without partaking the Eucharist and believing that it is the Body of Christ, will never ever understand the immensity of it no matter how many paper qualifications that person has. There is a difference between so call experts who study and those who lived it. One can study love their whole life but without ever being loved or feeling love for another, will never be a love expert although they may host newspaper columns, have psychology degrees, write books, consulting others etc.