For as the new heavens and the new earth, which I will make, shall remain before me, said the LORD…
(with Isaiah 60:20, 21): — The Christian Church is not the conqueror of the Jewish polity, but the heir and successor. The new covenant has been developed out of the old. There was no break when Christ came, but a fulfilment and a completion. And so the promises were handed down in the Christian line, among which these from the latter part of Isaiah, relating to the "stability' of the ancient Church, are not the least remarkable. They declare that God is an "everlasting" light to His people, that their permanence is like the permanence of the creation of God.
(T. D. Woolsey.)
Parallel VersesKJV: For as the new heavens and the new earth, which I will make, shall remain before me, saith the LORD, so shall your seed and your name remain.