Revelation 20:4
4 I saw thrones on which were seated those who had been given authority to judge. And I saw the souls of those who had been beheaded because of their testimony about Jesus and because of the word of God. They had not worshiped the beast or its image and had not received its mark on their foreheads or their hands. They came to life and reigned with Christ a thousand years.
This is one of the most controversial verses in the entire bible and a lot of Christians believe that it has to be a future event because they believe that it's on the resurrection day. But according to Paul he stated three times that it was a current reality back in his day.
Here below are the three texts.
Ephesians 2:4-6
4 But because of his great love for us, God, who is rich in mercy, 5 made us alive with Christ even when we were dead in transgressions—it is by grace you have been saved. 6 And God raised us up with Christ and seated us with him in the heavenly realms in Christ Jesus,
In the verses above Paul states that we were already made alive, raised up and seated with Christ in the heavenly realms.
Colossians 3:1
Since, then, you have been raised with Christ, set your hearts on things above, where Christ is, seated at the right hand of God.
Once again Paul states that we have already been raised up with Christ.
Romans 5:17
17 For if, by the trespass of the one man, death reigned through that one man, how much more will those who receive God’s abundant provision of grace and of the gift of righteousness reign in life through the one man, Jesus Christ!
Finally in the verse above Paul states that we reign in life through Jesus.
All of these verses were a current reality while alive in the physical body almost two thousand years ago. If it was a reality back, then it is still a reality today.
Paul ties three events directly to Revelation 20:4 "that we have been made alive", "seated with Christ in the heavenly realms" and that "we reign (in life) through Jesus".
Why do so many Christians not accept this even though Paul declares it? Because they are focused on it being physical not spiritual. They focus on the physical because it mentions saints that were beheaded by the beast and the thousand years.
But let's let scripture interpret scripture. Paul teaches that its spiritual and what John is saying in Revelation 20:4 is that even though the saints are beheaded they still live and reign spiritually the soul doesn't die with the body. It's a promise even though you may die for Jesus you will still live and reign spiritually. The beast can kill the body but not the soul.
Thus, according to Paul we reign in life now and have been for almost two thousand years we are not limited to a literal thousand years God has a better longer plan.
Why is it that only those passages count but the following don't?
1 Corinthians 15:51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
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.
54 So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
55 O death, where is thy sting? O grave, where is thy victory?
56 The sting of death is sin; and the strength of sin is the law.
57 But thanks be to God, which giveth us the victory through our Lord Jesus Christ.
1 Thessalonians 4:13 But I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope.
14 For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.
15 For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep.
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
Revelation 3:21 To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne.
Matthew 19:28 And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel.
Matthew 25:31 When the Son of man shall come in his glory, and all the holy angels with him, then shall he sit upon the throne of his glory:
IOW, why can't these passages explain the first resurrection and the reigning with Christ a thousand years meant in Revelation 20? It's not like the passages you supplied are the only options.