Theophylact of Bulgaria
Our Lord declared above the fearful and sensible signs of the evils which should overtake sinners, against which the only remedy is watching and prayer, as it is said, And take heed to yourselves, lest at any time, &c.
For that day will not come when men are expecting it, but unlooked for and by stealth, taking as a snare those who are unwary. For as a snare shall it come upon all them that sit upon the face of the earth. But this we may diligently keep far from us. For that day will take those that sit on the face of the earth, as the unthinking and slothful. But as many as are prompt and active in the way of good, not sitting and loitering on the ground, but rising from it, saying to themselves, Rise up, begone, for here there is no rest for thee. To such that day is not as a perilous snare, but a day of rejoicing.
Namely, hunger, pestilence, and such like, which for a time only threaten the elect and others, and those things also which are hereafter the lot of the guilty for ever. For these we can in no wise escape, save by watching and prayer.
And because a Christian needs not only to flee evil, but to strive to obtain glory, He adds, And to stand before the Son of man. For this is the glory of angels, to stand before the Son of man, our God, and always to behold His face.