This is the meaning of the new heaven and the new earth, and of the New Jerusalem coming down from there, as described in Revelation.

We read in Revelation:

I saw a new heaven and a new earth, because the former heaven and the former earth had passed away. And I, John, saw the Holy City New Jerusalem coming down from God out of heaven, prepared as a bride adorned for her husband. Rev. 21:1, 2.

We find something similar written in Isaiah:

Behold, I create a new heaven and a new earth. Rejoice and exult for ever. And behold, I shall make Jerusalem an exultation, and its people happiness. Isa. 65:17, 18.

I revealed above in this chapter that a new heaven is at the present time being formed by the Lord from Christians who have acknowledged in the world, or after leaving the world have been able to acknowledge, that the Lord is the God of heaven and earth, as He said in Matt. 28:18.