“And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.”
Matthew 24:30 — Greek Interlinear
Church Fathers on Matthew 24:30
As soon as the Lord has fortified the believers against the arts of Antichrist and his ministers, by shewing that His coming would be public, He proceeds to shew the order and method of His coming.
By the tribulation, He means the times of Antichrist and the false Prophets; for when there are so many deceivers, the tribulation will be great. But it shall not extend through any great length of time. For if for the elect’s sake the Jewish war is shortened, much more shall this tribulation be shortened for their sakes; for which reason He said not 'After,' but 'Immediately after,' for He shall come immediately after.
The darkening of the sun, the failing of the moon, and the fall of the stars, indicate the glories of His coming.