There can only be one NHNE.
I've never understood Isaiah 65:20 because everything else from verse 17 onward does not
seem to contradict anything said in Revelation 20-22, but I don't know who
the rest of the dead live not again until the thousand years are completed fits with Isa.65:20, or the NHNE.
But I have noticed an agreement with Isaiah 60:
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No one would deny that Revelation chapters 21 & 22 are describing the Kingdom of Christ, and Revelation 20:4-6 is talking about saints who will reign with Him in His Kingdom, saying,
"Blessed and holy is he that has part in the first resurrection: on such the second death has no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years." (Revelation 20:6).
It's also clear that after the destruction of the beast and his armies, there will be no more death for the bride, the Lamb's wife, i.e those who had overcome and had part in the first resurrection, because the second death has no authority over them,
and these are the people who are also being spoken about in Revelation 7:13-17 (those who had come out from great tribulation and had "washed their robes, and whitened them in the blood of the Lamb").
So I think that maybe, if we understand that the verses below are speaking about the bride of Christ, and the bride of Christ is being spoken of in Revelation 20:4-6 and Revelation 21, then this again makes sense and agrees with what is written in Isaiah (see the table in the images below):
Isaiah 65
13 So the Lord Jehovah says, Behold,
My servants will eat, but you will be hungry. Behold,
My servants will drink, but you will be thirsty. Behold,
My servants will rejoice, but you will be ashamed.
14 Behold,. My servants will sing for joy of heart, but you will cry for sorrow of heart, and will howl because of a breaking of spirit.
15 And you will leave your name for a curse to My chosen;
for the Lord Jehovah will kill you, and call His servants by another name.
16 He who blesses himself in the earth shall bless himself in the God of truth. And he who swears in the earth will swear by the God of truth; because the former troubles are forgotten, and because they are hidden from My eyes.
17
For, behold, I create new heavens and a new earth. And the things before will not be remembered, nor come to mind.
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IMO it's no accident that John falls down to worship the angel in both chapters. It's
because it's the same angel, and all part of the same vision!!. Revelation 20 is just telling us more about the same time-period mentioned in Revelation 21-22.
I also think it helps to strip away the chapter divisions that do not appear in the original text, but were added in 1227 AD for our benefit (easy reference).
Even so, I don't understand how Isaiah 65:20 fits the above picture, or even for that matter how it fits in Isaiah 65:17-25. Isaiah 65:20 has never been fulfilled literally, so it either means there is "another meaning", or there will be mortals in the millennium (which I personally don't see
in New Testament prophecy),
although about the book of Isaiah in general, I have noticed that Isaiah was prophesying
not only to both ancient Israel and to ancient Judah about things that later came to be fulfilled in different different time-periods in
their history, but also about the end of days of our time and what follows, and the entire book of Isaiah oscillates all the time from speaking to one group and another about one thing and another, and from one time-period in history to another (including prophecies about the Messiah who was to come), and this is how it goes
all the way through the book of Isaiah.
And a lot of the time Isaiah seems to project a lot of what was at least partially fulfilled when its time came, onto another time-period at the end of days. So the prophecy could
partially be referring to the restoration of Judah from Babylonian captivity.
So Isaiah 65:20 is somewhat of a curve-ball for me, but I don't believe it should distract from the facts I mentioned in the table images above.
PS: I'm still open to being wrong about the no mortals in the millennium, but only once it makes sense by agreeing with all other scripture.
@Davidpt And on the other hand, if there are mortals in the millennium then Isaiah 65:17-25 supports the NHNE and the millennium commencing at the same time.