The Unforgivable Sin

This Sunday's Gospel reading is Mark 3:20-35,

and the crowd came together again, so that they could not even eat. When his family heard it, they went out to restrain him, for people were saying, ‘He has gone out of his mind.’ And the scribes who came down from Jerusalem said, ‘He has Beelzebul, and by the ruler of the demons he casts out demons.’ And he called them to him, and spoke to them in parables, ‘How can Satan cast out Satan? If a kingdom is divided against itself, that kingdom cannot stand. And if a house is divided against itself, that house will not be able to stand. And if Satan has risen up against himself and is divided, he cannot stand, but his end has come. But no one can enter a strong man’s house and plunder his property without first tying up the strong man; then indeed the house can be plundered.
 ‘Truly I tell you, people will be forgiven for their sins and whatever blasphemies they utter; but whoever blasphemes against the Holy Spirit can never have forgiveness, but is guilty of an eternal sin’— for they had said, ‘He has an unclean spirit.’ Then his mother and his brothers came; and standing outside, they sent to him and called him.  crowd was sitting around him; and they said to him, ‘Your mother and your brothers and sisters are outside, asking for you.’ And he replied, ‘Who are my mother and my brothers?’ And looking at those who sat around him, he said, ‘Here are my mother and my brothers! Whoever does the will of God is my brother and sister and mother.’ 

I have heard this reading many times as the lectionary calendar cycled every three years through my life, but I never heard any priest discuss blasphemy against the Holy Spirit as the unforgivable sin, the eternal sin.

It is a scary thought, an unforgivable sin. It goes against every revisionist teaching that has ever been preached.

All your sins will be forgiven? Forget it if you blaspheme against the Holy Spirit.

Score one for the doctrine of the Trinity.