Good scripture!
"That day [the Day of the Lord] shall not come except there come a departing first [the rapture or catching away of the church] and then that man of sin be revealed...."
Does this fit the context? Certainly it does! Paul tells us in 6,7 & 8 and there is something holding back the antichrist, or hindering his being revealed. It is the CHURCH indwelt with the Holy Spirit. He - the Holy Spirit - is working through the church, restraining evil all over the globe. When the church is taken, suddenly the Holy Spirit has NO ONE LEFT to work with at the moment of departing. OF COURSE people will turn to God after that, but for a while, Satan will be free to get his man "revealed."
Then Paul tells us, this restrainer will be "taken out of the way."
Is not the church "taken out of the way" at the rapture? Of course it is! We go to heaven, and leave this world to the devil. He takes over through the Beast and sets up the image and mark.
So this verse (verse 3) is really telling us that the rapture must come first. And then - and ONLY then - can the man of sin be revealed. In other words, God is not going to allow him to be revealed until after we are gone.
For those that want to study the Greek, this "taken out of the way" could as well be translated "become out of the midst." Really it means the same thing: departed and moved out of the way.
Then if we look closely at the word in question: apostasia, we see it is a compound word, "apo" and "Stasia."
From "Apo" Strong's tells us:
- of separation of a part from the whole
- where of a whole some part is taken
At the rapture, FOR SURE a part of the whole population will be "taken out of the way" or SEPARATED from the rest.
Stasis: Or Histemi
1. A standing [stationary] state of standing still
2. A resurrection.
If we put the first part (separation of a part from a whole) with these two, which makes the most sense?
Of course, a part of the whole taken or separated from the whole while they are left standing.
this gives us the idea that the rapture will be INSTANT; so sudden it seems that when it happens, all others not taken are still standing there, wondering what just happened!
This is a much better fit than a part of a whole suddenly removed or separated for a resurrection!
Therefore it seems the very best idea of what Paul was writing is that we are not to be deceived: "that day [the day of the Lord] CANNOT come until first there is a sudden separation - a part of the whole population suddenly removed from the while - while those left behind are just left standing - wondering what happened. This fits perfectly with verses 6-8 where something is restraining, but it is to be "taken out of the way" and THEN the man of sin revealed.
If we look at the first translations into English, we see that they used the world "departing" rather than a falling away.