The Book of Mark: Demons and the Unforgivable Sin

Mark 3:9-12,20-30 (NASB)
And He told His disciples to see that a boat would be ready for Him because of the masses, so that they would not crowd Him; 10 for He had healed many, with the result that all those who had diseases pushed in around Him in order to touch Him. 11 And whenever the unclean spirits saw Him, they would fall down before Him and shout, “You are the Son of God!” 12 And He strongly warned them not to reveal who He was.

20 And He came home, and the crowd gathered again, to such an extent that they could not even eat a meal. 21 And when His own people heard about this, they came out to take custody of Him; for they were saying, “He has lost His senses.” 22 The scribes who came down from Jerusalem were saying, “He is possessed by Beelzebul,” and “He casts out the demons by the ruler of the demons.” 23 And so He called them to Himself and began speaking to them in parables: “How can Satan cast out Satan? 24 And if a kingdom is divided against itself, that kingdom cannot stand. 25 If a house is divided against itself, that house will not be able to stand. 26 And if Satan has risen up against himself and is divided, he cannot stand, but he is finished! 27 But no one can enter the strong man’s house and plunder his property unless he first ties up the strong man, and then he will plunder his house. 28 “Truly I say to you, all sins will be forgiven the sons and daughters of men, and whatever blasphemies they commit; 29 but whoever blasphemes against the Holy Spirit never has forgiveness, but is guilty of an eternal sin”— 30 because they were saying, “He has an unclean spirit.”

Mark 3:28-30
“Truly I say to you, all sins will be forgiven the sons and daughters of men, and whatever blasphemies they commit; 29 but whoever blasphemes against the Holy Spirit never has forgiveness, but is guilty of an eternal sin”— 30 because they were saying, “He has an unclean spirit.”

John 16:7-11
But I tell you the truth: it is to your advantage that I am leaving; for if I do not leave, the Helper will not come to you; but if I go, I will send Him to you. 8 And He, when He comes, will convict the world regarding sin, and righteousness, and judgment: 9 regarding sin, because they do not believe in Me; 10 and regarding righteousness, because I am going to the Father and you no longer are going to see Me; 11 and regarding judgment, because the ruler of this world has been judged.