It seems the primary work of the Holy Spirit is to open eyes/ears to the truth of the gospel, i.e., the Good News, that all sin is covered by the self sacrifice of Jesus on the cross. At risk of upsetting folk who don't want to discuss "opinions" of the meanings of scripture I'll say those passages refer to effectively calling the Holy Spirit (who is NOT a "Holy Ghost", by the way) a lier. The ONLY sin that sends anyone to hell is a rejection of the truth that faith/trust in the finished work of Jesus when he cried out, "It is finished." Therefore it's clear (at least to me) that when the testimony of the Holy Spirit is called a lie it's blasphemy and there is no other sacrifice or work that matters. (See John 3:17-18)
[i]Ref. any value comparison between sins; it's true that even the desire to sin is a sin but it's not true that all sins or sinful thoughts are "equal". Contrary to popular misconceptions, there will be no end times judgements about sending anyone to heaven or hell. The Lord's Judgement Seat in heaven will be to give rewards for good works done in the flesh. The Great White Throne punishments in the present hell will likewise be for bad works done in the flesh.
If those statements are not true then the Bible is wrong and there will be no real spiritual judgement nor any eternal difference in how good or bad we have lived. But that level of nonsense is not so.
Char-Gar, as a side issue on your comments on my previous observation about "It is finished", I'm 80 and have attended church services in various mainstream denominations as far back as I can remember. I've heard dozens - maybe even hundreds - of radio/TV messages about the cross, many by some big name preachers. Every one of them has stressed the bloody physical death of Jesus on the cross, not his agonized spiritual death, as the crux of that event. Not a single message I've ever heard has stressed that Jesus work was "finished" when He said it was finished but he clearly was not then physically dead.
I won't argue about what you believe is the correct orthodox interpretation of what "It is finished" actually meant or how young and dumb I must be for not having heard of what you have heard.
Thus the floor is your's because I'm an adult Christian; it's not critical so I don't care and I have no more to say about the issue.