True; however, that does not mean that all who live during the Millennium are saved and immortal.
There are both saved and lost at the second resurrection.
Do you really believe that no one - not even one - will be (become) saved during the Millennium?
Of course. But, that is not the whole complete every-detail-included story.
I can agree or disagree with this statement - depending on what particular sense-of-definition you apply to the word 'with'.
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John 5:
28 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice, 29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.
This verse is referring to the time of the second resurrection at the final Judgment.
Do you see that there are both saved and lost represented here?
Verse 29 above talks about 2 resurrections
The resurrection of damnation and the resurrection of life.
Only two.....
Revelation talks about 2, only 2 resurrections
One at the beginning of the millennium and one at the end.
Rev 20:4-6 4 ....
and they lived and reigned with Christ a thousand years. 5 But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection. 6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
Luk 14:14 ....for thou shalt be recompensed at the resurrection of the just.
Act 24:15 And have hope toward God, which they themselves also allow, that there shall be a resurrection of the dead, both of the just and unjust.
Only 2 ....the just and the unjust.
1Co 15:23 But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming.
Christ's people are raised at His coming
Those that are part of the first are raised incorruptible
1Co 15:52-53
52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. 53 For this corruptible must put on incorruption, and this mortal must put on immortality.
1Th 4:16-17
16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: 17 Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
Jesus clearly comes before the millennium
And the saved are all raised at His coming
The second resurrection happens after the millennium... and the second death....