Galatians 3:3 (NIV)
Are you so foolish? After beginning by means of the Spirit, are you now trying to finish by means of the flesh?
The Apostle Paul can see, (as can I) what happens when the natural understanding replaces, living by faith in Christ alone.
This is not about a theological or doctrinal position at all: as with “believing in” sound doctrines, but is rather a question of having started with Christ in us, by “Spirit” and in truth by faith: are you then going to lean to your own understanding, (of “things” or the Bible) independent of God, who is the spirit of truth, within the actual believer by grace?
This is why it is written in, 2 Thessalonians 2:10 (KJV) : And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. Systematic theologies destroy that “childlike faith”, which prevents most people from “entering in” with Christ via the Holy Spirit. 2 Corinthians 3: 6 (KJV) Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
Simply put, one is either with Christ now; in spirit and in truth, or they have taken a divergent path (broad road), and are moving further and further away from the Lord. Remember, the scriptures are normally addressing our sinful “spiritual condition”; and our independent flesh “must be put to death continually” (crucified in Christ), so as to be made into the image of our Lord and Savior (known as sanctification). It is a heart condition always; and not just an intellectual position of the Bible, or our works unto God; which are as filthy rags.