The coming of the lawless one is by the activity of Satan with all power and false signs and wonders,
9 Whose coming He confirms what he has said by an argument from contraries. For as Antichrist cannot stand otherwise than through the impostures of Satan, he must necessarily vanish as soon as Christ shines forth. In fine, as it is only in darkness that he reigns, the dawn of the day puts to flight and extinguishes the thick darkness of his reign.
In these words the apostle confutes the error against which he had cautioned them, and gives the reasons why they should not expect the coming of Christ as just at hand. There were several events previous to the second coming of Christ; in particular, he tells them there would be, I. A general apostasy, there would come a falling away first, Th2 2:3.
Commenting on 2 Thessalonians 2:3-12
Even him whose coming is after the working of Satan,.... That is, as a deceiver, a liar, and a murderer; for such was the working of Satan with our first parents; he seduced Eve, not only by subtlety, but by lying; he abode not in the truth, is the father of lies, and a murderer from the beginning: and such is the working of antichrist...