Important Note: All instances of the 1000 years are phrased in a literal sense. Revelation always used specific amounts of time, like 42 months, 5 months, 1260 days, in a literal sense. When an idiom is used, it is made plain like 1000 times 1000. When the text says “a thousand years,” it is being literal; Revelation already has an idiom for countlessness, “1000 times 1000,” so if we were to expect this to be a countless number as well, then it would have said “1000 times 1000 years”. But, it does not. It says exactly 1000 years. And, not just one time in this way, but every time, 6 in total. This means 1000 years means 1000 years.

As an example of an idiom, in John 6, we see the idea of “the last day,” and in 2 Peter 3:8, we see “But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.” Because “the last day” in John is flexible in its characteristics as it is used as a title, “the last day”, it is not limited to a 24-hour day. But, for “a thousand years,” it is not titled until first defined as a literal amount of time. It is possible, then, that 2 Peter 3:8 corresponds to “the last day” of roughly 1000 years, and that “the last day” also likely includes the 7 years of tribulation. Mainly, Revelation confirms this through the way Jesus speaks of the last day in John and what the prophecy of Revelation reveals about it. That “the last day” is 1000 years.

The early church might have understood this concept of a literal 1000 years. For example, Irenaeus, Against Heresies 5.28.3 or the Epistle of Barnabas 15.4–5. Epistle of Barnabas 15.4–5, “Notice, children, what He means by the words He completed them in six days. He means this: in six thousand years the Lord will make an end of all things; for, in His reckoning, the “day” means “a thousand years.” He is Himself, my witness, when He says: Behold, a day of the Lord is as a thousand years. Therefore, children, in six days—in the course of six thousand years—all things will be brought to an end. 5 And He rested on the seventh day. This is the meaning: when His Son returns, He will put an end to the era of the Lawless One, judge the wicked, and change the sun, the moon, and the stars. Then, on the seventh day, He will properly rest” Here we see the author, thought not known to truly be Barnabas, Barnabas writes of an expected 6000 years leading up to the end and then a last 7th day for rest. Or, the end comes at the 6000th year. And then “the last day” as John 6:39 describes, “And this is the Father’s will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.” And now, in Revelation 20, we see further fulfillment of that word, if not already begun in Revelation 14:1 and 7.

20And I saw a messenger come down from heaven, having the key [r.0] of the bottomless pit [r.1] [r.2] and a great chain in his hand.
[r.0]

Re 1:18, Re 3:7, Re 9:1, Re 20:1He has the keys, the only angel that is shown to have a key is Jesus. So this is likely Jesus.

[r.2]

Re 9:1, Re 20:1Key of the bottomless pit.

[time]
2 And he laid hold on the dragon, that old serpent, who is the Devil, and Satan, and bound him a thousand years [r.3].
3 And cast him into the bottomless pit [r.4], and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years [r.5] should be fulfilled [r.6]: and after that he must be loosed a small season.
[r.6]

Important Note: The living in heaven are seen on thrones as a first group BEFORE the dead are raised. The second group is described as having died. These dead were NOT reaped at the 7th trumpet. These are also distinct from the ones already on the throne and are already glorified. This resurrection comes after the first group given thrones. This is the reverse order of what Paul describes in 1 Corinthians 15:52 and 1 Thessalonians 4:15-18. The second group is only resurrected after the sea beast is cast into the lake of fire, and Satan is cast into the bottomless pit, and the living are enthroned. This is well after the 7th vial plague.

Also, in Revelation 20:4, the dead are not described in explicit terms as overcoming or having victory over the beast. In context, the beast has already been dealt with, so there is no need for the passage to frame their vindication as a present-tense "victory over him." We may naturally think in those terms—and that may be a sound inference—but the text itself does not emphasize it the way earlier passages do.

By contrast, Revelation 12 and Revelation 15 speak in defined, overt language of salvation, victory, and overcoming. Those scenes feel like triumph. They read like the testimony of people who are on top of the conflict, not merely crushed beneath it.

4 And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls [r.7] of those who were beheaded for the witness of Jesus, and for the word of God, and who had not worshipped the beast [r.8], neither his image [r.9], nor had received his mark [r.10] upon their foreheads [r.11], or in their hands; and they lived and reigned with Christ a thousand years [r.12] [r.13].
[fn]

The living saints are already ruling on thrones, the dead are mentioned next.

[r.7]

Re 6:9, Re 20:4

[r.8]

Re 15:2, Re 20:4

[r.13]

Re 1:6, Re 20:4, Re 21:24

5 But the rest of the dead lived not again until the thousand years [r.14] [r.15] were finished. This is the first resurrection.
[fn]

This "first" resurrection is clearly positioned within this portion of Revelation, not the whole book, as we have already seen the resurrection of the two witnesses in 11:11. So, this first resurrection does not need to include the resurrection of 1 Corinthians 15:52.

6 Blessed [r.16] and holy is he who 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 [r.17].

Important Note: Here we see that Jerusalem, the beloved city, is still in existence, so it is not Mystery Babylon, as that city is never seen again.

7 And when the thousand years [r.18] are expired, Satan shall be loosed out of his prison [r.19].
[fn]

"Expired" points to a clear countdown of time, not an allegorical or idiomatic time.

[r.19]

Re 11:7, Re 17:8, Re 20:3, Re 20:7Bottomless pit.

8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together for the war: the number of whom is as the sand of the sea.
9 And they ascended on the breadth of the earth, and compassed the camp of the saints about, and the beloved city [r.20]: and fire came down from God out of heaven, and devoured them.
[fn]

If Mystery Babylon is Jerusalem, then how do we see this city, Jerusalem, still standing?

[fn]

The expression “the beloved city” occurs explicitly only in Revelation 20:9 (τὴν πόλιν τὴν ἠγαπημένην), yet the concept is rooted in the Old Testament portrayal of Zion/Jerusalem as the object of God’s מיוחדת love and delight (Ps 78:68; 87:2; Isa 62:4), providing the canonical background for its identification.

[r.20]

Re 11:2, Re 20:9

10 And the devil who deceived them was cast into the lake of fire [r.21] and brimstone, where the beast and the false prophet are, and shall be tormented day and night forever and ever.
[fn]

Perdition.

[r.21]
11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them [r.22].
[r.22]

Re 3:21, Re 6:16, Re 20:11, Re 22:1, Re 22:3Keep in mind the Father and the Son are one, and they share the throne.

12 And I saw the dead, small and great, stand before the throne; and the books were opened: and another book was opened, which is the book of life [r.23]: and the dead were judged out of those things which were written in the books, according to their works [r.24].
[fn]

Here it says "the dead stand". This is a way of saying, the dead are resurrected. That is, this is the next resurrection after the first in the context of this portion of the book of Revelation. Also, the demonstrates a Revelation is not always explicit about how it describes a resurrection. This leaves room for an interpretation of 12:11 as a possible resurrection, given its phrasing of the dead in the passage as those who "overcome".

13 And the sea gave up the dead who were in it; and death and hell [r.25] delivered up the dead who were in them: and they were judged every man according to their works [r.26].
14 And death and hell [r.27] were cast into the lake of fire [r.28]. This is the second death, the lake of fire.
[r.28]
15 And whosoever was not found written in the book of life [r.29] was cast into [r.30] the lake of fire [r.31].
[r.30]

Re 14:10, Re 20:15

[r.31]