Mark 3:29 Eternal damnation!

²⁹ But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation. -Mark 3:29 Bible, King James Version

Heaven and its Wonders and Hell From Things Heard and Seen by Emanuel Swedenborg

Chapter 57

550. Evil spirits are severely punished in the world of spirits in order that by means of punishments they may be deterred from doing evil. This also appears to be from the Lord; and yet nothing of punishment there is from the Lord, but is from the evil itself; since evil is so joined with its own punishment that the two cannot be separated. For the infernal crew desire and love nothing so much as doing evil, especially inflicting punishments and torment upon others; and they maltreat and inflict punishments upon every one who is not protected by the Lord. When, therefore, evil is done from an evil heart, because it thereby discards all protection from the Lord, infernal spirits rush upon the one who does the evil, and inflict punishment. This may be partly illustrated by evils and their punishments in the world, where the two are also joined. For laws in the world prescribe a penalty for every evil; therefore he that rushes into evil rushes also into the penalty of evil. The only difference is that in the world the evil may be concealed; but in the other life it cannot be concealed. All this makes clear that the Lord does evil to no one; and that it is the same as it is in the world, where it is not the king nor the judge nor the law that is the cause of punishment to the guilty, because these are not the cause of the evil in the evil doer.

It is important to realize that no one goes to hell for eternity or suffers everlasting punishment. This is explained in the Mormon scriptures:

The Doctrine and Covenants

Section 19

(Revelation given through Joseph Smith, at Manchester, New York, March 1830)

4 And surely every man must repent or suffer, for I, God, am endless.

5 Wherefore, I revoke not the judgments which I shall pass, but woes shall go forth, weeping, wailing and gnashing of teeth, yea, to those who are found on my left hand.

6 Nevertheless, it is not written that there shall be no end to this torment, but it is written endless torment.

7 Again, it is written eternal damnation; wherefore it is more express than other scriptures, that it might work upon the hearts of the children of men, altogether for my name’s glory.

8 Wherefore, I will explain unto you this mystery, for it is meet unto you to know even as mine apostles.

9 I speak unto you that are chosen in this thing, even as one, that you may enter into my rest.

10 For, behold, the mystery of godliness, how great is it! For, behold, I am endless, and the punishment which is given from my hand is endless punishment, for Endless is my name. Wherefore—

11 Eternal punishment is God’s punishment.

12 Endless punishment is God’s punishment.

The punishments of the Lord don't last forever...

 Charles W. Penrose

Because God is an eternal being, his laws are eternal, and there are penalties attached to all of them. But it does not follow that because a person may be banished into the eternal punishment it is intended that he shall stay there eternally. He may go into eternal punishment, he may go to the place prepared for the rebellious and the sinner and stay there but for a certain period. Some may stay longer than others. In the language of the Scriptures, some are beaten with many stripes, and others are beaten with but few stripes; but all stay until they have paid the uttermost farthing; all are punished according to the gravity of their guilt. (Journal of Discourses, 26 vols. [London: Latter-day Saints' Book Depot, 1854-1886], 24: 91.)