Excellent discussion on the use of the Greek word “apostasia” in this passage in regard to its meaning and the Rapture of the church.

I find it interesting that the 1599 Geneva Bible translates this passage as, “Let no man deceive you by any means: for that day shall not come, except there come a departing first, and that man of sin be disclosed, even the son of perdition (2 Thessalonians 2:3).

And even then Andy Woods points out in the Greek there is a definite article there so it could read, “…except there come THE departing first…”

Find more information on Dr. Woods’ Youtube page here.
Full video session on this topic with Dr. Woods’ here.