That is what true spiritual nobility is all about.
Now, why does the Bible say that the Bereans were more "noble" than the Thessalonians?
11 Now the Berean Jews were of more noble character than those in Thessalonica, for they received the message with great eagerness and examined the Scriptures every day to see if what Paul said was true. (Acts 17:11)
You see, the Bereans didn't take Paul only at his word; they searched the "scriptures" -- the Old Testament for them -- to see if it reinforced/matched his teachings. They tested any new revelations by existing ones.
Now why do we know that truth exists as proclaimed by the church universal? Because ...the church of the living God, [is] the pillar and foundation of the truth. (Apostle Paul, 1 Timothy 3:15)
We know God speaks thru the church, even proclaiming truth to the forces of darkness who left heaven: His intent was that now, through the church, the manifold wisdom of God should be made known to the rulers and authorities in the heavenly realms, 11 according to his eternal purpose that he accomplished in Christ Jesus our Lord. (Ephesians 3:10-11)
I recall that some passage admonishes us that no man knows the mind of God and I certainly dont believe that God talks directly to any fallable man, regardless of their piety.
Well, you have cited a passage that does stress that only the Holy Spirit knows the divine Mind...
...But the Bible doesn't stop there, because it then says that same Holy Spirit indwells His body-and-blood church:
...as it is written: What no eye has seen, what no ear has heard, and what no human mind has conceived the things God has prepared for those who love him 10 these are the things God has revealed to us by his Spirit. The Spirit searches all things, even the deep things of God. 11 For who knows a persons thoughts except their own spirit within them? In the same way no one knows the thoughts of God except the Spirit of God. 12 What we have received is not the spirit of the world, but the Spirit who is from God, so that we may understand what God has freely given us. 13 This is what we speak, not in words taught us by human wisdom but in words taught by the Spirit, explaining spiritual realities with Spirit-taught words. 14 The person without the Spirit does not accept the things that come from the Spirit of God but considers them foolishness, and cannot understand them because they are discerned only through the Spirit. 15 The person with the Spirit makes judgments about all things, but such a person is not subject to merely human judgments, 16 for, Who has known the mind of the Lord so as to instruct him? But we have the mind of Christ. (1 Corinthians 2:9-16)
But why do some CONSERVATIVEs on FR go all MEGO on us when SCRIPTURE is posted? Dismissing it with an imperial wave of the hand?