Section 19

16 For behold, I, God, have suffered these things for all, that they might not suffer if they would repent;
17 But if they would not repent they must suffer even as I;
18 Which suffering caused myself, even God, the greatest of all, to tremble because of pain, and to bleed at every pore, and to suffer both body and spirit—and would that I might not drink the bitter cup, and shrink—
19 Nevertheless, glory be to the Father, and I partook and finished my preparations unto the children of men.
Jesus declares that one of his names is "Endless."  Therefore, when he speaks in the scriptures of endless punishment he is not saying that it is forever; rather, he is saying that he is in charge of the judgment and the duration of the punishment.  For those who repent the there is no punishment.  But for those who refuse his grace, they must be punished according to the law for their disobedience. Nevertheless, Jesus does not mete out punishment that does not fit the sin.  Punishment will end when the price is paid.  The notion of burning forever in one's sins is nonsense.  It is Christ's work and glory to bring to pass the immortality and eternal life of all of God's children.  His work is not done until even the most rebellious and vial of sinners is brought out of mental and spiritual prison. Remember that Christ's Atonement covers all of us.  All will be resurrected and all will someday be cleansed for all sin and pronounced clean.