2 Thess 2:8-12
9 The coming of the lawless one will be in accordance with the work of Satan displayed in all kinds of counterfeit miracles, signs and wonders, 10 and in every sort of evil that deceives those who are perishing. They perish because they refused to love the truth and so be saved. 11 For this reason God sends them a powerful delusion so that they will believe the lie 12 and so that all will be condemned who have not believed the truth but have delighted in wickedness.
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2 Thessalonians 2:10
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 with all deceivableness of unrighteousness] There are two ideas here. The first is, that there would be deceit; and the other is, that it would be for the purpose of promoting unrighteousness or iniquity. The iniquitous system would be maintained by fraudulent methods. No one who has read Pascal's Provincial Letters can ever doubt that this description is applicable to the system of the Jesuits; and no one familiar with the acts of the papacy, as they have always been practiced, can doubt that the whole system is accurately described by this language. The plausible reasoning by which the advocates of that system have palliated and apologized for sins of various kinds, has been among its most remarkable features.
[In them that perish Among those who will perish; that is, among the abandoned and wicked. The reference is to men of corrupt minds and lives, over whom this system would have power; countenancing them in their depravity, and fitting them still farther for destruction. The idea is, that these acts would have special reference to men who would be lost at any rate, and who would be sustained in their wickedness by this false and delusive system.
[Because they received not the love of the truth] They prefer this system of error and delusion to the simple and pure gospel, by which they might have been saved.
(from Barnes' Notes, Electronic Database Copyright © 1997, 2003, 2005, 2006 by Biblesoft, Inc. All rights reserved.)
John 16:8 And when He has come, He will convict the world of sin, and of righteousness, and of judgment: 9 of sin, because they do not believe in Me; 10 of righteousness, because I go to My Father and you see Me no more; 11 of judgment, because the ruler of this world is judged.
It is easy to forget that Satan is actually the ruler of this fallen world. Looking at the progress made by the godless left it becomes easy to remember.