If I understand what the writer is saying I disagree.
First he says a Christian can’t sin against The Holy Ghost. I vehemently disagree in that it is nearly impossible to commit this sin unless you are a Christian, for it is only Christians who have this witness from The Holy Ghost that Jesus is Christ.
In my understanding it is only people who have had a sure witness from The Holy Ghost who can commit this sin. For instance, When Christ asked His Apostles “Whom do people say that I am?” After the others answered Peter said that He was the Son of God, even Christ. After Peter said this Christ explained that no earthly person had given him this knowledge but that he got it by revelation, I think from The Holy Ghost. If Peter had later denied The Christ after having received this spiritual witness then he would have committed the unpardonable sin.
I do not believe this sin can be committed by anyone to whom the Holy Ghost has not given sure witness of the divinity of The Christ.
One of the difficulties of Christianity is that for most of us our practice of Christianity is based on faith, not a pure knowledge. Perhaps after the exercise of our faith we will gain a witness from The Holy Ghost of the truthfulness of the Divinity of Christ but I’m not sure that most Christians have this knowledge. Once we have been privileged to receive this witness of the Holy Ghost we are no longer unable to commit the unpardonable sin but are very much subject to it.
I do not necessarily believe that just because The Holy Ghost communicates with you that you have received this witness but once you KNOW whom it is that Jesus really is that you could commit this unpardonable sin. You can’t fall off the precipice until you have reached it.
I imagine that all the Apostles knew by a witness of The Holy Ghost that Jesus was The Son of God even Judas. It is my belief that Christ called him perdition because of this sin. Woe be unto Judas, his suffering will be eternal.
As I read scripture I believe that I feel the Holy Ghost telling me the truthfulness of what I read. Once He tells me the truthfulness of reading about The Savior then I am subject to the law of the unpardonable sin.
....”Once we have been privileged to receive this witness of the Holy Ghost we are no longer unable to commit the unpardonable sin but are very much subject to it.”.....
The unpardonable sin is to deny the finished work of Christ ....some might do so for a time in their life and later come to accept it for themselves.....If they die in denial they are lost.