I do not put much weight in Paul's letters. They aren't very spiritual.
As to your first statement, it doesn't matter how much weight we place in the pauline epistles, as much as it matters we first confess our sins to Him and turn away from sin to return to Him, all through faith in Christ, each and every time we study Scripture.
Next, we allow the Word of God to be communicated to us. The Word is His Divine revelation of what He planned to communicate to us.
When the Word is communicated to us, by speech or by print, we first enter into a comprehension of the Word by our thinking. While we remain in faith through Christ, there is nothing unrighteous in our faith preventing God from taking that thinking in the soul and making it understood to our scarred souls, then very similar to a heart or pumping machine of our blood, there is also nothing unrighteous in our faith to prevent Him from making that Word understood in our spirit.
Paul, an apostle to the Romans, bears witness of things spiritual throughout His epistles. Yet those things spiritual are not discerned except where shown to us by God. In the case of our becoming further sanctified, this is also a work of God, the Holy Spirit.
At present you might feel more comfortable not discerning the persons of the Godhead, but one important facet of our learning is to recognize that in our scarred thinking, our scarred soul, our proper learning is based upon His work, not our feelings or emotions, but rather our faith in Him in all things.
Instead of taking my word for it, or any religious word for it, try returning to Him, and allow Him, through faith in Him, to guide you appropriately.