Apostol § 275

Brethren, concerning the coming of our Lord Jesus Christ and our gathering together unto Him, we beseech you, not to be soon shaken in mind or troubled, neither by spirit, nor by word, nor by letter, as if from us, as though the day of Christ is at hand… Let no man deceive you by any means; for that day shall not come unless the falling away comes first, and the man of sin is revealed, the son of perdition, who opposes and exalts himself above all that is called God, or that is worshipped, so that he sits as God in the temple of God, showing himself that he is God. Do you not remember that when I was still with you I told you these things? And now you know what is restraining, that he may be revealed in his own time. For the mystery of iniquity is already at work; only He who now restrains will do so until He is taken out of the way. And then shall the wicked one be revealed, whom the Lord shall consume with the breath of His mouth and destroy with the brightness of His coming. The coming of the wicked one is according to the working of Satan, with all power, signs, and lying wonders, and with all unrighteous deception among those who perish, because they did not receive the love of the truth, that they might be saved. And for this reason God will send them strong delusion, that they should believe the lie, that they all may be condemned who did not believe the truth but had pleasure in unrighteousness.