8 Bible Verses about Unforgivable Sin

This is why I tell you that men may find forgiveness for every other sin and impious word, but that for impious speaking against the Holy Spirit they shall find no forgiveness. And whoever shall speak against the Son of Man may obtain forgiveness; but whoever speaks against the Holy Spirit, neither in this nor in the coming age shall he obtain forgiveness."

In solemn truth I tell you that all their sins may be pardoned to the sons of men, and all their blasphemies, however they may have blasphemed; but whoever blasphemes against the Holy Spirit, he remains for ever unabsolved: he is guilty of a sin of the Ages."

"Moreover every one who shall speak against the Son of Man, may obtain forgiveness; but he who blasphemes the Holy Spirit will never obtain forgiveness.

For if we wilfully persist in sin after having received the full knowledge of the truth, there no longer remains in reserve any other sacrifice for sins. There remains nothing but a certain awful expectation of judgement, and the fury of a fire which before long will devour the enemies of the truth. Any one who bids defiance to the Law of Moses is put to death without mercy on the testimony of two or three witnesses.read more.
How much severer punishment, think you, will he be held to deserve who has trampled under foot the Son of God, has not regarded as holy that Covenant-blood with which he was set free from sin, and has insulted the Spirit from whom comes grace?

This was because they said, "He is possessed by a foul spirit."

The Pharisees heard it and said, "This man only expels demons by the power of Baal-zebul, the Prince of demons."

The Scribes, too, who had come down from Jerusalem said, "He has Baal-zebul in him; and it is by the power of the Prince of the demons that he expels the demons."

But some among them said, "It is by the power of Baal-zebul, the Prince of the demons, that he expels the demons."