1 Thessalonians 4:15

He says that those who "remain unto the coming of Christ," along with "the dead in Christ, shall rise first," being "caught up in the clouds to meet the Lord in the air." I find it was in their foresight of all this, that the heavenly intelligences gazed with admiration on "the Jerusalem which is above," and by the mouth of Isaiah said long ago: "Who are these that fly as clouds, and as doves with their young ones, unto me? " Now, as Christ has prepared for us this ascension into heaven, He must be the Christ of whom Amos spoke: "It is He who builds His ascent up to the heavens," even for Himself and His people.

Now the privilege of this favour awaits those who shall at the coming of the Lord be found in the flesh, and who shall, owing to the oppressions of the time of Antichrist, deserve by an instantaneous death, which is accomplished by a sudden change, to become qualified to join the rising saints; as he writes to the Thessalonians: "For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep. For the Lord Himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: then we too shall ourselves be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord."

"For this we say unto you by the word of the Lord, that we that are alive, that are left unto the coming of the Lord, shall in nowise precede them that are fallen asleep." Speaking concerning the faithful, and them "which are fallen asleep in Christ" (1 Cor. xv. 18); and again, "the dead shall rise in Christ." Since his discourse is not concerning the Resurrection only, but both concerning the Resurrection and concerning the honor in glory; all then shall partake of a Resurrection, he says, but not all shall be in glory, only those in Christ. Since therefore he wishes to comfort them, he comforts them not with this only, but also with the abundant honor, and with its speedy arrival, since they knew that. For in proof that he wishes to comfort them with the honor, as he goes on, he says, "And we shall be ever with the Lord": and "we shall be caught up in the clouds." But how do the faithful fall asleep in Jesus? It means having Christ within themselves. But the expression, "He shall bring with Him," shows that they are brought from many places. "This." Something strange he was about to tell them. On this account he also adds what makes it worthy of credit; "From the word of the Lord," he says, that is, we speak not of ourselves, but having learnt from Christ, "That we that are alive, that are left unto the coming of the Lord, shall in nowise precede them that are fallen asleep." Which also he says in his Epistle to the Corinthians; "In a moment, in the twinkling of an eye." (1 Cor. xv. 52) Here he gives a credibility to the Resurrection by the manner also in which it will occur. For because the matter seems to be difficult he says that as it is easy for the living to be taken up, so also for the departed. But in saying "we," he does not speak of himself, for he was not about to remain until the Resurrection, but he speaks of the faithful. On this account he has added, "We that are left unto the coming of the Lord shall in nowise precede them that are fallen asleep." As if he had said, Think not that there is any difficulty. It is God that does it. They who are then alive shall not anticipate those who are dissolved, who are rotted, who have been dead ten thousand years. But as it is easy to bring those who are entire, so is it also those who are dissolved.