Now, brothers, concerning the coming of our Lord Jesus Christ, and our gathering together to him, we ask you not to be quickly shaken in your mind, nor yet be troubled, either by spirit, or by word, or by letter as from us, saying that the day of Christ had come. Let no one deceive you in any way. 3 For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction, 4he who opposes and exalts himself against all that is called God or that is worshiped; so that he sits as God in the temple of God, setting himself up as God. 5Don't you remember that, when I was still with you, I told you these things? 6 Now you know what is restraining him, to the end that he may be revealed in his own season. 7 For the mystery of lawlessness already works. Only there is one who restrains now, until he is taken out of the way.
It is easier to get what Paul is speaking of when he sort of repeats himself, as in the way verse three reads, then he repeats himself in verse 6 and 7, explain what the departure is with regard to 'restraining' the lawless one.
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