Charles Spurgeon Commentary 2 Thessalonians 2:8-12

"And then shall be revealed the lawless one, whom the Lord Jesus shall slay with the breath of his mouth, and bring to nought by the manifestation of his coming; [even he], whose coming is according to the working of Satan with all power and signs and lying wonders, and with all deceit of unrighteousness for them that perish; because they received not the love of the truth, that they might be saved. And for this cause God sendeth them a working of error, that they should believe a lie: that they all might be judged who believed not the truth, but had pleasure in unrighteousness." — 2 Thessalonians 2:8-12 (ASV)

And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming: even him, whose coming is after the working of Satan with all power and signs and lying wonders, and with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. And for this cause God shall send them strong delusion, that they should believe a lie: that they all might be damned who believed not the truth, but had pleasure in unrighteousness.

We will not attempt to explain all this in detail. It would be too much of a task for a mere exposition; but the Church always has to be on her guard against that which comes as an angel of light, but is really a spirit of darkness.