Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness. We, according to his promise, look for new heavens - The promise to which it is supposed the apostle alludes, is found Isaiah 65:17 : Behold, I create new heavens and a new earth; and the former shall not be remembered, nor come into mind; and Isaiah 66:22 : For as the new heavens and the new earth which I will make shall remain before me, saith the Lord, so shall your seed, etc. Now, although these may be interpreted of the glory of the Gospel dispensation, yet, if St. Peter refer to them, they must have a more extended meaning.
It does appear, from these promises, that the apostle says here, and what is said Revelation 21:27; Revelation 22:14, Revelation 22:15, that the present earth, though destined to be burned up, will not be destroyed, but be renewed and refined, purged from all moral and natural imperfection, and made the endless abode of blessed spirits. But this state is certainly to be expected after the day of judgment; for on this the apostle is very express, who says the conflagration and renovation are to take place at the judgment of the great day; see 2 Peter 3:7, 2 Peter 3:8, 2 Peter 3:10, 2 Peter 3:12. That such an event may take place is very possible; and, from the terms used by St. Peter, is very probable. And, indeed, it is more reasonable and philosophical to conclude that the earth shall be refined and restored, than finally destroyed. But this has nothing to do with what some call the millennium state; as this shall take place when time, with the present state and order of things, shall be no more.