2 Thess 2:1-8
2 1-4 Now, I am requesting you, brethren, with regard to the coming and personal presence of our Lord Jesus Christ, even our being assembled together to Him, not soon to become unsettled, the source of this unsettled state being your minds, neither be thrown into confusion, either by a spirit [a believer in the Christian assembly claiming the authority of divine revelation and claiming to give the saints a word from God], or through a word [received personally] as from us or through a letter falsely alleged to be written by us, to the effect that the day of the Lord has come and is now present. Do not begin to allow anyone to lead you astray in any way, because that day shall not come except the aforementioned departure [of the Church to heaven] comes first and the man of the lawlessness is disclosed [in his true identity], the son of perdition, he who sets himself in opposition to and exalts himself above everyone and everything that is called a god or that is an object of worship, so that he seats himself in the inner sanctuary of God, proclaiming himself to be deity.
5-7 Do you not remember that while I was still with you I kept on telling you these things? And now you know with a positive assurance that which [namely, the departure of the Church, the saints being assembled together to the Lord] is preventing his being disclosed [as to his true identity] in his strategic, appointed time, for the mystery of the aforementioned lawlessness is now operating. Only He [the Holy Spirit] who is holding [the lawlessness] down, [will do so] until He goes out from the midst [of humanity].
8-12 And then shall the Lawless One be disclosed [in his true identity], whom the Lord Jesus shall slay with the breath of His mouth and render inoperative by the sudden appearance of His personal presence, the coming and presence of whom [the man of lawlessness] is according to the operation of Satan in the sphere of miracles demonstrating power and attesting miracles and miracles of a startling, imposing, amazement-wakening character which deceive, and whose coming and presence is in the sphere of every kind of wicked deception geared to [the gullibility of] those who are perishing, [this gullibility being] caused by the fact that they did not accept the love for the truth to the end that they might be saved. And because of this God sends them a deluding influence resulting in their believing the lie, in order that they all might be judged who did not believe the truth but took delight in wickedness.
(from The New Testament: An Expanded Translation by Kenneth S. Wuest Copyright © 1961 by Wm. B. Eerdmans Publishing Co. All rights reserved.)