John Chrysostom
He then describes astonishing wonders. What sort of wonders is He addressing? "Immediately after the tribulation of those days," He states, "the sun will be darkened." What tribulation is He referring to? The tribulation associated with the days of the Antichrist and the false prophets. Indeed, the suffering during that time will be significant, with numerous deceivers arising. However, this period will be brief. Just as the Jewish conflict was shortened for the sake of the elect, this trial will be abbreviated even more for their benefit. For this reason, Christ did not simply say, "After the tribulation," but rather, "suddenly, after the tribulation of those days, the sun will be darkened," indicating that these events will unfold almost at once.
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False prophets and false Christs will emerge and create turmoil, and immediately, Christ Himself will return. During that time, great disorder will engulf the cosmos. How will His coming be? In such a manner that all creation will be transformed. "The sun shall be darkened," not destroyed but overshadowed by the brilliance of His arrival; "and the stars shall fall from heaven," for what purpose will they serve in the absence of night? "And the powers of the heavens shall be shaken," and rightly so, given the magnitude of the change. If they were filled with fear and wonder when the stars were created—"When the stars were made," the Lord says, "all my angels joyfully praised me with a loud voice" (Job 38:7)—how could they not be even more terrified and shaken when they witness all things being transformed, their fellow servants being judged, the entire universe facing a profound reckoning, and all who have lived from Adam until the coming of Christ being required to account for their deeds?