Reference has already been made to a period of tribulation yet to come upon the earth. That period is referred to in Scripture by various figures: "The great tribulation," "the time of Jacob's trouble," and "a day of darkness and gloominess, a day of clouds and thick darkness." It is also described as the culmination of the great apostasy which is predicted for the end of this age and which is emphasized in the later Epistles of the New Testament. These Epistles not only recognize a complete apostasy yet to come in this age, but teach that the beginning of that apostasy was apparent even then at the time when they were written. This teaching of the apostles finds its natural culmination in the last book of the Bible wherein the exact development of the apostasy and the conditions to prevail in the tribulation are recorded at length. All other references, both in the Old and the New Testaments, perfectly agree with this extended description. In reference to the time of the tribulation which is thus predicted, Paul states in II Thes. 2:3 "Let no man deceive you by any means: for that day ('the day of the Lord') shall not come, except there come a falling away first, and that man of Sin be revealed, the son of perdition," thus showing that the tribulation precedes the day of the Lord; and in Rev. 19 that day is seen to be the termination of the tribulation, which is previously described in that book. This period of tribulation is, therefore, to come before the Kingdom Age, and to be ended by the glorious appearing of Christ, the King.