Why will the millennial reign be another time of testing?
The millennial reign will be another time of testing because those entering the Kingdom are only believers—Gentiles who believed during the Tribulation under the 144,000’s preaching and the saved remnant of Israel. The thousand-year reign is an introduction into the Eternal, not a denial of the Kingdom’s forever promises.
Les explains that the thousand-year reign of Christ is really just an introduction into the Eternal. Even though the Old Testament speaks of the Kingdom as forever and ever, Revelation puts a thousand-year time frame on it, so Scripture is not contradicting itself. He says the millennial reign will have to be another time of testing because as we come into the Kingdom, it is only believers: Gentiles who believed during the Tribulation under the 144,000’s preaching, and the remnant of Israel will be saved. In eternity, there will be nations again, with Christ ruling and reigning, in his view from the New Jerusalem.