Blasphemy of the Holy Spirit, what is it?

In my opinion, the unforgivable sin, the blasphemy against the Holy Spirit, consists in misusing one’s training and education in the Scriptures to publicly and knowingly slander the Holy Spirit by misleading people into thinking that He is Satan. Clearly no one who does this can be forgiven, because it is through the Holy Spirit that we are forgiven. Also, no one who thinks that the Holy Spirit is Satan will permit himself to be guided by Him or filled with Him or given gifts by Him. So just as pulling the main breaker in your house means that you can never receive electricity, blaspheming against the Holy Spirit means that you can never receive forgiveness, because it turns off the tap through which forgiveness flows!