My take, if you’re interested, is that once a person comes to true faith in Jesus Christ as savior and they are sealed with the Holy Spirit “until the day of redemption”, they cannot become unsaved, un-born again, un-adopted, unfilled with the HS. That would mean God would cast his child and the Holy Spirit into hell. That’s why I don’t ever try to judge whether or not someone is saved. I cannot see their heart, only God can. Also, since we are saved by grace, we are kept saved by that same grace. If we could lose our salvation because of sin, that would be no different than saying we are saved by not sinning, or saved by good works. That is just not what grace is all about.
Those verses from Hebrews can be read as saying that since Christ cannot be sacrificed again, one cannot re-repent and be reborn again, EVER. No second chances, you blow it once it is IMPOSSIBLE to return again to the former state and start over. If this is what is meant, then the parable of the prodigal son would have ended with him staying with the pigs. I think instead this means we can never go that far because we have the Holy Spirit indwelling us, if we are truly his. God is a God of second chances, and thirds, and fourths, and...
I’m inclined to agree with your interpretation. As I said, I haven’t studied the issue, and simply don’t want to commit to one side or the other. Arminius thought there were good arguments on both sides, and refused to commit.
I DO object to HarleyD writing in post 8014 “If you believe in “free will” then it doesn’t surprise me to see you believe one can lose their salvation” when in post 8000 I wrote to him, “I haven’t studied it, and wouldn’t want to commit one way or the other.”
Until I do study it, I choose to think I should believe in eternal security, and live as though salvation could be lost.