The sin that cannot be forgiven before death for an individual can absolutely be none and therefore when Jesus says the blasphemy against the holy spirit will never be forgiven before the age he could not at all be talking about an individual human being since otherwise it would nullify either the sacraments of confession or the anointing of the sick. St John Paul II discusses this he attributes this sin to the final impenitance.
For imagine the absurdity that a person committed this sin and then repented and went to the priests and the priest said well I can't forgive you you can't go to confession because this is unforgivable that's absurd
There is nothing that cannot be forgiven in the confessional absolutely nothing and that is whether it is an abortion whether it is murder whether it is pedophilia and whether it is any other thing that slanders God even slandering the holy spirit because of a person repents a slander in the Holy Spirit they will be forgiven
Hence Jesus can only be talking apocalyptically
And he must be referring to the great apostasy at the end of the world
At the end of the world after having seen a dress rehearsal for the end of the world in the minor chastisement that is coming in our day
being shown what happens when humanity discards God and thinks they can do things on their own
And if there were not enough but having the Holy Spirit descend from heaven and bring peace for a great age with faith and science reconciled
And then accuse this great age of peace to have bén existed merely because of the secular developments rather than the Holy Spirit
Will be saying that by the the powers of this world was the devil restrained from imposing his wrath on the human race
And this would be saying that since the prince of this world is the devil then by the powers of this world or the powers of the devil was the devil restrained
since peace is the absence of murder and the devil is the murderer from the beginning
This is what the blasphemy of the holy spirit is most likely to be
This thing could only be the great apostasy which historically will not be forgiven because it will be the most radical spitting in the face of God the most depraved rejection of God like the demons
Taking delight in hating God's goodness. Here's an example: https://crusadergal.substack.com/p/making-holy-the-mutilated
These Anglican women priests are offering blessings for transgender transitioning. The article continues: "If that wasn’t low enough, an entire custom liturgy has been invented, so that those who have decided to pretend to be the opposite sex can be celebrated publicly in the midst of an attempt at worshiping God. How one can claim to worship God at the same event where he denies the inherent nature of one of His children and encourages the mutilation thereof is beyond my understanding. That’s an incongruent act, unless it’s a different god that they’re worshiping."
This seems to be another kind of sin against the Holy Spirit, if not all three Persons of the Trinity, rejecting God's goodness for one's own warped vision of creation that rejects the Creator's design. St. Thomas would have nothing good to say about these wicked women insulting God (as Creator, Redeemer and Sanctifier) for their own devious delight in the complex sin of transgenderism in deference to homosexuality.