Charles Spurgeon Commentary Revelation 21:1

"And I saw a new heaven and a new earth: for the first heaven and the first earth are passed away; and the sea is no more." — Revelation 21:1 (ASV)

Astronomers tell us that, within living memory, several starry worlds have burned out and vanished out of sight. The apostle Peter has told us that this world also will be destroyed by fire, but it will afterward be renewed, and a new sky and a new earth will appear after the first firmament and the first earth will have become extinct. God intends for this planet to continue to exist after it has undergone a new creation and renewed its youth.

The regeneration of His people, their new birth, is a foretaste of what is yet to happen to this whole world of ours. We have the first-fruits of the Spirit, and we groan within ourselves while we wait for the fullness of that new creation. The first heaven and the first earth were passed away; and there was no more sea, because the sea is the emblem of separation, and destruction, and unrest. The sea has her dead which will be given up. The sea now cannot rest nor be quiet, but all will be calm and tranquil in the new heaven and the new earth.