And the scribes who came down from Jerusalem were saying, “He is possessed by Beelzebul,” and “by the prince of demons he casts out the demons.” And he called them to him and said 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 is coming to an end. But no one can enter a strong man’s house and plunder his goods, unless he first binds the strong man. Then indeed he may plunder his house.Mark 3:22-30 (ESV)
“Truly, I say to you, all sins will be forgiven the children of man, and whatever blasphemies they utter, but whoever blasphemes against the Holy Spirit never has forgiveness, but is guilty of an eternal sin”— for they were saying, “He has an unclean spirit.”
What is the unpardonable sin? In Mark 3:22-30, Jesus responds to the teachers of the law who accuse Christ of being possessed and empowered by the prince of demons. His response contains both a sober warning and a sweet promise of assurance.
Christ will forgive all sins for those who repent and come to Him in faith. The unpardonable sin is the settled, determined, hostile rejection of the Gospel.