28 "Listen to this carefully. I'm warning you. There's nothing done or said that can't be forgiven. 29 But if you persist in your slanders against God's Holy Spirit, you are repudiating the very One who forgives, sawing off the branch on which you're sitting, severing by your own perversity all connection with the One who forgives." 30 He gave this warning because they were accusing him of being in league with Evil.
Matthew Henry's Commentary on Mark 3:28-30
Commentary on Mark 3:22-30
(Read Mark 3:22-30)
It was plain that the doctrine of Christ had a direct tendency to break the devil's power; and it was as plain, that casting of him out of the bodies of people, confirmed that doctrine; therefore Satan could not support such a design. Christ gave an awful warning against speaking such dangerous words. It is true the gospel promises, because Christ has purchased, forgiveness for the greatest sins and sinners; but by this sin, they would oppose the gifts of the Holy Ghost after Christ's ascension. Such is the enmity of the heart, that unconverted men pretend believers are doing Satan's work, when sinners are brought to repentance and newness of life.