It’s my belief that God’s judgments are eternal. He destroys the old forever in hell and makes new by His grace. Christ is the first fruits. The second fruits are those chosen by grace in this lifetime. The third fruits are those who receive no forgiveness in this age or the age to come. They must suffer eternal destruction of the old person in hell. God then makes them new. I base my understanding on how God judges in the O.T. It is said to last forever but He does make new. All will eventually confess Christ as Lord to the glory of the Father. It is only Satan and his angels that are tormented forever. After all, hell was created for them.
Isaiah 32:
10 In little more than a year you will shudder, you complacent women; for the grape harvest fails, the fruit harvest will not come. 11 Tremble, you women who are at ease, shudder, you complacent ones; strip, and make yourselves bare, and tie sackcloth around your waist. 12 Beat your breasts for the pleasant fields, for the fruitful vine, 13 for the soil of my people growing up in thorns and briers, yes, for all the joyous houses in the exultant city. 14 For the palace is forsaken, the populous city deserted; the hill and the watchtower will become dens forever, a joy of wild donkeys, a pasture of flocks; 15 until the Spirit is poured upon us from on high, and the wilderness becomes a fruitful field, and the fruitful field is deemed a forest. 16 Then justice will dwell in the wilderness, and righteousness abide in the fruitful field. 17 And the effect of righteousness will be peace, and the result of righteousness, quietness and trust forever. 18 My people will abide in a peaceful habitation, in secure dwellings, and in quiet resting places. 19 And it will hail when the forest falls down, and the city will be utterly laid low. 20 Happy are you who sow beside all waters, who let the feet of the ox and the donkey range free.