Who brings the strong delusion?

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And now you know what is restraining, that he may be revealed in his own time.Forthemystery of lawlessness is already at work; onlyHe who now restrainswill do sountil He is taken out of the way.And then the lawless one will be revealed,whom the Lord will consumewith the breath of His mouth and destroywith the brightness of His coming.The coming of thelawless oneisaccording to the working of Satan, with all power,signs, and lying wonders,and with all unrighteous deception amongthose who perish, because they did not receivethe love of the truth, that they might be saved.Andfor 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 buthad pleasure in unrighteousness.
2 Thessalonians 2:6-12