If one interprets the passages in Hebrews as indicating you can lose your salvation one must also recognize you cannot get it back.
It refers to a calculated decision to abandon Christ, and in that case there would be no desire to get it back.
Hebrews 10:26 - “sin willfully” refers to the act of apostasy. The whole epistle was a warning to the Jews about going back to Temple worship.
The OT tells us to raise up a child in the way that they should go and when they are grown they will not depart from it. Is GOD not the most perfect loving parent?
But an adopted child that will not take lessons on the way that they should go can have the adoption reneged, revoked. But GOD is more faithful and has the most perfect adjusted for each individual method of parenting.
Lest we forget, Paul actually settled the questions in his letter to the Corinthians, where a fellow of the congregation was sinning in a way event he pagans would reject: he was living in marriage with his mother! Paul's advice was to give that one up to be driven by satan, so the flesh would perish but the soul be saved unto the day of 'deliverance' ... which I interpret as The Rapture, given the context of that portion of the letter. But it is not a settled issue.
Bottom line is discernment ... 'use perspective, Luke, use the Spirit perspective.' God does not renege, defraud, or lie. It is upon HIS Promise that one is born again, born from above, and HE has promised to raise us up in the way that we should go, stumbles and pratfalls included.
Read Heb. 6:1-3 and try hard to tie it to what the writer is saying in 4-8. Christians, he says, can fail to produce the kind of crop that God intended. And it is futile to think that simple, basic teaching about fundamentals of faith will move them in the midst of their crucifying activity. And, yes they will be destined for fire, unless they are somehow moved to recognize what they are doing. They are dogs returning to their vomit.
But his current audience is not to that point of crucifying their Savior again. So, he looks forward, God willing, to extending their knowledge and their faith toward perseverance.
So, in context, it is not for all time impossible for them to come to repentance, just not by simple truths presented in their present frame of mind and action.