Good discussion, guys. When I started ministry 40 + years ago, I studied these subjects, and have heard thousands of teachings on them, plus taught and shared them quite consistently, as you can imagine.
I doubt there is much about salvation I haven’t heard, or seen in action. That being said, main secret I have learned is read and study the word properly, for correct interpretation, best we can, anyway.
This means, take ALL verses pertaining to a subject, and compare them, check the Hebrew and Greek definitions, and the different interpretations your spirit comes with, compared to your MIND!!!###
In other words “meditate” on the word, chew it awhile, pray over it, sometimes days. You will find God WILL give revelations of His word to those who DILLIGENTLY seek the truth.
The “once saved, always saved” teaching is one I worked on for years, off and on. I am a former Baptist, so that was ingrained in me from youth.
There are many, many scriptures on that subject, my favorite is on the LAST page of the Bible, so that, to me, is very important.
Revelation 22:19-- A man’s name can be REMOVED from the Lamb’s book of life is plenty clear for me. Plus, Skinneej’s verse about “working out my own salvation”, plus Revelation 12:8-10?, after satan is cast down to earth, the angels declare, “now has come salvation”.
On the issue of sin from Paul in Romans 7, Skinneej right again, he is talking about “inherent” sin, OLD MAN, still around, Paul was a man who was VERY wicked, compared to most men, so his flesh control was harder, and God knows us, so He would not take away the ‘special’ irritating sin from Paul. That, I believe, was his big flesh problem that he NEVER got rid of.
For the plucking out the eye, the “sermon on the mount” was all spiritual lessons, that were somewhat exaggerated for emphasis.
I DO believe He intended some people to take those literally, as stated, in Heaven or hell situations(life and death).
As to the unpardonable sin, Luke 12:10-11-- Is NOT unbelief, verse 11