What is the mysterious unpardonable sin?

[ARBITER01]

I see your point, but. . .


. . .the passage doesn't actually say that rejecting Christ as Messiah is blasphemy against the Holy Spirit. It wasn't rejection of Christ that caused Jesus to accuse them of blaspheming the Holy Spirit, it was actual words spoken against the Holy Spirit Himself. Jesus never said "anyone who rejects that I am the Messiah shall never be forgiven." He says that if you blaspheme the Holy Spirit, you will not be forgiven. The Pharisees were rejecting Jesus as Messiah long before Jesus leveled that accusation at them. It wasn't until they attributed the works of the Holy Spirit Himself to Satan that Jesus accuses them of commiting this unforgivable sin.

But those are my thoughts. I admit that I could be wrong. Can you elaborate a bit further?

You are correct.