Eschatology is the doctrine of the Last Things. It looks unto the future, and on the basis of the teaching of Scripture, sets out what will happen in the future. Some people allow their imagination to lead them into fantastical speculation. But theology should always be sober and restrained, and based upon what God has clearly revealed. In trying to interpret prophecy, we must exercise a measure of caution, as it is notoriously difficult to interpret. When Christ came the first time, he took almost everyone by surprise. Although the Jews had the wonderful and detailed prophecies of the Old Testament, and they had a clear idea in their own minds what would happen, it didn’t turn out as they expected. As one writer put it, when Christ came the first time, they all got it wrong. So it will be when Christ returns the second time. Even the best works of theology would be found to be somewhat inaccurate.
So what then is the purpose of the Judgment Day? It will change nothing. The destiny of each individual is already fixed at death. The purpose of the Judgment Day is to reveal God’s justice and mercy. It will demonstrate the righteousness of the righteous, and the wickedness of the wicked. God’s people will be openly acknowledged and acquitted. The wickedness of the wicked will be fully exposed. All secrets of every heart and life will be revealed, and as it has been said, there will be a resurrection of reputations of the righteous who have been maligned in this world. Hypocrites will be unmasked. Every mouth shall be stopped, and all mankind will acknowledge that God is just, and right, and true, and that his judgment is just.