But mark thou, I pray you, the dispensation of the Spirit, that John wrote none of these things, lest he should seem to write from the very history of the things done (for indeed he lived a long time after the taking of the city), but they, who died before the taking, and had seen none of these things, they write it, in order that every way the power of the prediction should clearly shine forth.
“Then, if any man shall say unto you, Lo, here is Christ, or there; believe it not: for there shall arise false Christs, and false prophets, and shall show signs and wonders, so as to deceive, if possible, the very elect. Behold, I have told you before. Wherefore if they shall say unto you, Behold, He is in the desert, go not forth: behold, He is in the secret chambers, believe it not. For as the lightning comes out of the east, and shines even unto the west, so shall also the coming of the Son of Man be. For wheresoever the carcass is, there shall the eagles be gathered together.”
Having finished what concerned Jerusalem, He passes on to His own coming, and tells the signs of it, not for their use only, but for us also, and for all that shall come after us.
“Then.” When? Here, as I have often said, the word, “then,” relates not to the connection in order of time with the things before mentioned. At least, when He was minded to express the connection of time, He added, “Immediately after the tribulation of those days,” but here not so, but, “then,” not meaning what should follow straightway after these things, but what should be in the time, when these things were to be done, of which He was about to speak. So also when it is said, “In those days comes John the Baptist,” he is not speaking of the time that should straightway follow, but that many years after, and that in which these things were done, of which He was about to speak. For, in fact, having spoken of the birth of Jesus, and of the coming of the magi, and of the death of Herod, He at once says, “In those days comes John the Baptist;” although thirty years had intervened. But this is customary in the Scripture, I mean, to use this manner of narration. So then here also, having passed over all the intermediate time from the taking of Jerusalem unto the preludes of the consummation, He speaks of the time just before the consummation. “Then,” He says therefore, “if any man shall say unto you, Lo, here is Christ, or there, believe it not.”
Awhile He secures them by the place, mentioning the distinguishing marks of His second coming, and the indications of the deceivers. For not, as when at His former coming He appeared in Bethlehem, and in a small corner of the world, and no one knew Him at the beginning, so does He say it shall be then too; but openly and with all circumstance, and so as not to need one to tell these things. And this is no small sign that He will not come secretly.
But mark how here He says nothing of war (for He is interpreting the doctrine concerning His advent), but of them that attempt to deceive. For some in the days of the apostles deceived the multitude, “for they shall come,” says He, “and shall deceive many;” and others shall do so before His second coming, who shall also be more grievous than the former. “For they shall show,” He says, “signs and wonders, so as to deceive if possible the very elect:” here He is speaking of Antichrist, and indicates that some also shall minister to him. Of him Paul too speaks on this wise. Having called him “man of sin,” and “son of perdition,” He added, “Whose coming is after the working of Satan, with all power and signs and lying wonders; and with all deceivableness of unrighteousness in them that perish.”
And see how He secures them; “Go not forth into the deserts, enter not into the secret chambers.” He did not say, “Go, and do not believe;” but, “Go not forth, neither depart there.” For great then will be the deceiving, because that even deceiving miracles are wrought.
3. Having told them how Antichrist comes, as, for instance, that it will be in a place; He says how Himself also comes. How then does He Himself come? “As the lightning comes out of the east, and shines even unto the west, so shall also the coming of the Son of Man be. For wheresoever the carcass is, there also will the eagles be gathered together.”
How then shines the lightning? It needs not one to talk of it, it needs not a herald, but even to them that sit in houses, and to them in chambers it shows itself in an instant of time throughout the whole world. So shall that coming be, showing itself at once everywhere by reason of the shining forth of His glory. But He mentions also another sign, “where the carcass is, there also shall the eagles be;” meaning the multitude of the angels, of the martyrs, of all the saints.
Then He tells of fearful prodigies. What are these prodigies? “Immediately after the tribulation of those days,” says He, “the sun shall be darkened.” Of the tribulation of what days does He speak? Of those of Antichrist and of the false prophets? For there shall be great tribulation, there being so many deceivers. But it is not protracted to a length of time. For if the Jewish war was shortened for the elect's sake, much more shall this temptation be limited for these same's sake. Therefore, He said not, “after the tribulation,” but immediately “after the tribulation of those days shall the sun be darkened,” for almost at the same time all things come to pass. For the false prophets and false Christs shall come and cause confusion, and immediately He Himself will be here. Because no small turmoil is then to prevail over the world.
But how does He come? The very creation being then transfigured, for “the sun shall be darkened,” not destroyed, but overcome by the light of His presence; and the stars shall fall, for what shall be the need of them thenceforth, there being no night? And “the powers of Heaven shall be shaken,” and in all likelihood, seeing so great a change come to pass. For if when the stars were made, they trembled and marvelled (“for when the stars were made, all angels,” it is said, “praised Me with a loud voice”); much more seeing all things in course of change, and their fellow servants giving account, and the whole world standing by that awful judgment-seat, and those who have lived from Adam unto His coming, having an account demanded of them of all that they did, how shall they but tremble, and be shaken?
“Then shall appear the sign of the Son of Man in Heaven;” that is, the cross being brighter than the sun, since this last will be darkened, and hide himself, and that will appear when it would not appear, unless it were far brighter than the beams of the sun. But wherefore does the sign appear? In order that the shamelessness of the Jews may be more abundantly silenced. For having the cross as the greatest plea, Christ thus comes to that judgment-seat, showing not His wounds only, but also the death of reproach. “Then shall the tribes mourn,” for there shall be no need of an accusation, when they see the cross; and they shall mourn, that by His death they are nothing benefited; because they crucified Him whom they ought to have adored.
Do you see how fearfully He has pictured His coming? How He has stirred up the spirits of His disciples? For this reason, let me add, He puts the mournful things first, and then the good things, that in this way also He may comfort and refresh them. And of His passion He suggests to them the remembrance, and of His resurrection, and with a display of glory, He mentions His cross, so that they may not be ashamed nor grieve, whereas indeed He comes then setting it forth for His sign. And another says, “They shall look on Him whom they pierced.” Therefore it is that they shall mourn, when they see that this is He.
And forasmuch as He had made mention of the cross, He added, “They shall see the Son of Man coming,” no longer on the cross, but “in the clouds of Heaven, with power and great glory.”
Source: Homilies on the Gospel of St. Matthew (New Advent)