Amen! The only sin God can't forgive - the Unpardonable Sin - is "blasphemy against the Holy Spirit" .... but what is it?
It's resisting and resisting the Holy Spirit's pleadings, His reasonings, His convicting power which shows us our sins and our need to repent until we are past the point of no return when we've "seared" the conscience, permanently hardened our heart, crossed that "hidden boundary between God's mercy and His wrath". Why, then, does the Bible make it a point to mention the Holy Spirit's role? So that in the day of Judgment the lost will be without excuse, having been forewarned of that mysterious disturbance that makes them uncomfortable with their sin is God Himself, pleading, reasoning, convicting.
In other words, the only sin God can't forgive is the sin for which we fail to ask for forgiveness and deliverance.
It -the Unpardonable Sin - the "blasphemy against the Holy Spirit" -, is resisting the sole and only <
pleadings> of and by the Holy Spirit of God and the despising and rejecting of <His reasonings, His convicting power which shows us our sins and our need to repent> IN LIGHT OF THE LIGHT THE WORD, GOD the SON that IN THE BEGINNING WAS, that was with God and WHO WAS AND IS AND EVER WILL BE THE SAME
until we are past the point of no return when we've "seared" the conscience, permanently hardened our heart, crossed that "hidden boundary between God's mercy and His wrath". Why, then, does the Bible make it a point to mention the Holy Spirit's role? So that in the day of Judgment the lost will be without excuse, having been forewarned of that mysterious disturbance that makes them uncomfortable with their sin is God Himself, pleading, reasoning, convicting.
In other words, the only sin God can't forgive is the sin for which we fail to ask for forgiveness and deliverance.
It -the Unpardonable Sin - the "blasphemy against the Holy Spirit" -, is resisting the sole and only <
pleadings> of and by the Holy Spirit of God and the despising and rejecting of <
His reasonings, His convicting power which shows us our sins and our need to repent> in the light of the WORD Jesus Christ the Light of the World” who “lightens the world”, so that there shall be NO ONE without excuse TO WHOM THE LIGHT HAS ENLIGHTENED—IN AND FROM the Holy Scripture, which is what makes each case of the blasphemy against the Holy Spirit a case of BLASPHEMY AGAINST THE MAN JESUS CHRIST.
No one who has not received the Scriptures can or will sin against The Spirit who breathed Holy Scripture. “The Spirit shall testify of Him”, Jesus Christ. God is both the
Spirit and the
Power,
pleading, reasoning, and
convicting…which shows us our sins and our need to repent, by “testifying” and “convincing” the lost sinner
about Jesus Christ IN SCRIPTURE.
There never can be a sinner who has no knowledge of Holy Scripture who commits blasphemy against the Holy Spirit. If one say <
until we are past the point of no return> pointed out in SCRIPTURE WHICH IS JESUS CHRIST, we are talking truth because Christ is
the point of no return. When we say <
we've "seared" the conscience, permanently hardened our heart, crossed that "hidden boundary between God's mercy and His wrath"> while this was never a
searing of the conscience in the furnace with ANOTHER with you in the furnace, or the
permanent hardening of our heart in the Plague that was upon HIM The First Born of GOD, or the
crossing of that hidden boundary between God's mercy and His wrath JESUS CHRIST the Stumbling Block in The Only WAY, when we say so, we just are haughtily
boasting as if we dispose of the noble propensities and are not totally depraved so that as natural creatures we would never have had such subjective ‘spiritual’ issues as you list above.
<
Why, then, does the Bible make it a point to mention the Holy Spirit's role?> <
So that in the day of Judgment the lost will be without excuse>, for sure!
BUT NOT because <
having been forewarned of that mysterious disturbance that makes them uncomfortable with their sin>,
AS IF <
that mysterious disturbance is God Himself, pleading, reasoning, convicting>, BUT
IS GOD and is GOD IN CHRIST revealed and real “in the flesh” IN AND THROUGH THE HOLY FOR THAT VERY PURPOSE
SCRIPTURE.
Because of Holy Scripture no one else than Jews and Christians possibly can sin against the Holy Spirit. But it is not sin against the Holy Spirit which is the cause of eternal death; it is sin against GOD THE FATHER AND THE SON AND THE SPIRIT—common human sin.
Compare what Arthur Pink says,

But Ah! the Word and the Spirit are inseparable and act together and at once and the one never without the other.