2 Thessalonians 2:1

For that he did not depart, we may conjecture from hence: for he says in this Epistle, "We beseech you by the coming of our Lord Jesus Christ." For in his first Epistle he said, "Concerning the times and the seasons ye have no need that aught be written unto you." So that if he had gone, there would have been no need of his writing. But since the question was deferred, on this account he adds this Epistle, as in his Epistle to Timothy he says, "They subvert the faith of some, saying that the Resurrection is already past"; that the faithful henceforth hoping for nothing great or splendid, might faint under their sufferings. For since that hope supported them, and did not allow them to yield to the present evils, the devil wishing to cut it off, as being a kind of anchor, when he was not able to persuade them that the things to come were false, went to work another way, and having suborned certain pestilential men, endeavored to deceive those who believed into a persuasion that those great and splendid things had received their fulfillment. Accordingly these men then said that the Resurrection was already past. But now they said that the Judgment and the coming of Christ were at hand, that they might involve even Christ in a falsehood, and having pointed out to them that there is hereafter no retribution, nor judgment-seat, nor punishment and vengeance for those who had done them evil, they might both render these more bold, and those more dispirited.

"Now we beseech you, brethren, touching the coming of our Lord Jesus Christ, and our gathering together unto Him; to the end that ye be not quickly shaken from your mind." When the Ressurection will be, he has not said, but that it will not be now, he has said. "And our gathering together unto Him." This also is no little matter. See how the exhortation also is again accompanied with commendation and encouragement, in that He and all the Saints will certainly appear with us. Here he is discoursing concerning the resurrection and our gathering together. For these things will happen at the same time. He raises up their minds.