This is the first resurrection.
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.
For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven.
No one on this earth at this time, is already in the resurrection and as the angels in heaven. Therefore no man at this time is in the Millennium of Christ on earth.
Now if someone wants to say they are already in the resurrection, and as angels in heaven, then by all means do so, and be rebuked by Paul for overthrowing the faith:
Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.
Or they can say the first resurrection of the blessed, is not the resurrection Jesus preaches.
Matthew 22:29-32 (KJV) Jesus answered and said unto them,
Ye do err, not knowing the scriptures, nor the power of God. For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven. But as touching the resurrection of the dead, have ye not read that which was spoken unto you by God, saying, I am the God of Abraham, and the God of Isaac, and the God of Jacob? God is not the God of the dead, but of the living.
This is not a difficult passage to understand when one has faith to believe all that Christ has said. Those of faith, like Abraham, Isaac, and Jacob, long ago physically dead, according to Christ are not dead even though their bodies are. They cannot be dead because God is not the God of the dead, but of the living.
Why would Christ say in the resurrection, physically dead saints are "of the living" and "are as the angels of God in heaven"? Because it is the spirit that gives us life, the flesh profits nothing!
John 6:63 (KJV) It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
Christ is the resurrection and the life, and whosoever lives and believes in Him shall NEVER die. When man has lived and partaken of Christ, the resurrection and the life, that is to have eternal spiritual life through His Spirit in us, and though our bodies will suffer death, our spirit ascends to heaven to be as the angels of God, spiritual body, not physical body.
John 11:25-26 (KJV) Jesus said unto her,
I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live: And whosoever liveth and believeth in me shall never die. Believest thou this?
Christ says that for man to know and enter the Kingdom of God they must be born again! (Jo 3) When man is born again, they are indwelt with the Holy Spirit sent from Christ, and with the Spirit in our spirit
forever we have eternal spiritual life through Him. Death of our body is not death for our spirit because our spirit after physical death leaves our body and ascends to heaven a spirit (living) soul. Since Christ is the resurrection and the life, when we have faith in Him our spirit never dies but is as the angels in heaven who are spirit beings.
John sees faithful saints in heaven alive after they had physically died in time, which a thousand years are. They have no physical body because they were beheaded, and the physical body of faithful saints will not be resurrected immortal & incorruptible until the last trump sounds and they are physically resurrected and changed. Those whom he sees John calls 'souls'. They cannot be souls without life. Since they have no body the life they have is NOT physical, but spirit life, as the angels in heaven.
The first mention of living souls of martyred saints John writes had already
lived and reigned with Christ in time, he likens to a thousand years. But when John mentions those holy and blessed of the first resurrection who have overcome the second death, he says they too
shall reign with Christ in this same time he likens to a thousand years.
Since Christ is the first resurrection, and whosoever lives and believes in Him shall never die, John's vision shows whosoever has faith to believe that ALL who live and reign with Christ in time shall not die, and as Christ has promised shall always be with Him wherever He is. It matters not whether the faithful live with Him as spirit souls in heaven or live with Him as complete human once more on the new earth. Not even death can keep us from Him, if in TIME, likened to a thousand years, we partake of Christ's resurrection, for He is THE resurrection and the life, and whosoever lives (time) and believes in Him shall NEVER die.