After describing the coming of the Messiah, John’s vision turns to a scene of thrones. These thrones for those who were killed during the time of tribulation described in Revelation. There are other New Testament passages promising thrones to the faithful. In Matt 19:28 Jesus tells the twelve disciples they will sit on “twelve thrones, judging the twelve tribes of Israel.” In 1 Cor 6:2-3, Paul tells the Corinthians that believers will “judge the world” and will “judge angels.” Even in Revelation, the one who overcomes will have sit with Jesus on his throne (Rev 3:21).
The souls John sees in these verses are likely those under the altar in Rev 6:9. In that context, the souls were crying out to God asking to be avenged. Likewise, in 20:4 these souls were put to death because of their testimony of Jesus. These souls came to life and reign with Christ for the 1000 years (Rev 20:4). The verb ζάω (“came to life”) is used often in Revelation to describe God as the “living one” (1:18, 10:6) or Jesus as the one who “died and lives again” (2:8). In 13:14 the beast appears to have died and “came to life.” This first resurrection is after the tribulation and the return of Jesus. It is quite specific since only those who were martyred are raised. But they are raised to life on earth, not some ethereal heavenly state.
The function of these souls is that they are “priests of God” and reign with Christ. This reflects Exodus 19:6, God’s promise that Israel would be a nation of priests. This is consistent with the rest of Revelation. In 1:5-6 the people of God are called “a kingdom and priests,” now at the end of the book a kingdom is established and the resurrected martyrs fulfill Israel’s role as priests of God.
How should we understand the “1000 years?” A 1000 year rule by the messiah is not mentioned anywhere in Scripture. Even though a kingdom is described frequently in both the Old and New Testaments, the duration of 1000 years is not found. In fact, the kingdom is usually described as eternal: it never ends. But the idea of a Millennium (Latin, mille, a thousand; anum, years) is not based on this single passage since even here the kingdom continues forever, even if an event occurs after 1000 years.
The Jews were expecting a Messiah to come and establish a kingdom, a real physical rule on earth. This Messiah would be God’s personal representative, and like the kings of Israel, would be called a “son of God.” Beyond this, they speculated about how long human history would last, and how much of that history would be the kingdom. Ranges for the duration of the kingdom in Jewish apocalyptic ranged from 40 years to 7000 years. In the Apocalypse of Weeks human history is portrayed as a series of ten “weeks,” the first seven weeks lead up to the time of the writer but the eighth through tenth weeks are still future. 1 Enoch describes this “eighth week” after the judgment as a “week of righteousness.” During this period a house will be built for the great king “in glory forevermore” (91:12-13). The (Christian) letter of Barnabas described the history of the world in seven creational days of 1000 years each, with the seventh being the idealized age (i.e., the kingdom).
John clearly intends for us to understand a particular period of time in human history when Christ will rule with the martyred on earth. This was the understanding of the early church as well, Justin Martyr taught in the second century that the dead in Christ would be raised, followed by 1000 years in Jerusalem. Irenaeus, also in the second century, taught that there would be an earthly millennium where saints and martyrs would be rewarded. But by the fifth century, Augustine tried to interpret the kingdom in a non-literal way. The 1000 years, he taught, were the interval between the first and second coming. Satan was bound in Jesus earthly ministry, the first resurrection is the moment of salvation.
Revelation 20 follows the glorious return of the Lord and represents the final vindication of those who have died for their testimony of Jesus—they are raised to life to reign with Jesus. This reign is the fulfillment of the messianic expectations of Jews and Christians in the first century. God will act decisively and send his anointed one to deal with the empires of man. The point of the Millennium is not to reward martyrs in some sensual paradise, but to demonstrate that God’s Kingdom has finally overcome the kingdoms of man.