Yes, Revelations is very interesting. A couple of weeks ago we read all of Revelations out loud with everyone in the congregation participating. The Holy Spirit quickened some portions of the scripture as He often does. It was a blessed evening.As to your question, I'm not a pastor and it's an interesting question you posed. Personally I don't use commentaries that much because I want to be reliant on the Holy Spirit more than reliant on someone else's interpretation but sometimes they're helpful. Here's what Adam Clarke said about this verse. "Except there come a falling away first] We have the original word apostasia in our word apostasy; and by this term we understand a dereliction of the essential principles of religious truth - either a total abandonment of Christianity itself, or such a corruption of its doctrines as renders the whole system completely inefficient to salvation. But what this apostasy means is a question which has not yet, and perhaps never will be, answered to general satisfaction."I think your pastor could be correct and I don't claim to know. I used to be into all the "pre-trib" stuff and frankly I don't believe it any more for a whole host of reasons.I believe there is already a great falling away, at least in the United States and the evidence of that manifestation is very clear. So the apostasy appears to me to be very real at present. Here's some verses for you to ponder as well.Don't be fooled by what they say.For that day will not come until there is a great rebellion against God and the man of lawlessness is revealed--the one who brings destruction.Footnote: Greek the son of destruction.New Living Translation © 1996 Tyndale Charitable Trust NKJV - 2Th 2:3 - Let no one deceive you by any means; for that Day will not come unless the falling away comes first, and the man of sin is revealed, the son of perdition, New King James Version © 1982 Thomas Nelson NASB - 2Th 2:3 - Let no one in any way deceive you, for {it will not come} unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction, New American Standard Bible © 1995 Lockman Foundation RSV - 2Th 2:3 - Let no one deceive you in any way; for that day will not come, unless the rebellion comes first, and the man of lawlessness is revealed, the son of perdition,Revised Standard Version © 1947, 1952. Webster - 2Th 2:3 - Let no man deceive you by any means: for [that day shall not come], except there come a falling away first, and that man of sin be revealed, the son of perdition;Noah Webster Version 1833 Info Young - 2Th 2:3 - let not any one deceive you in any manner, because -- if the falling away may not come first, and the man of sin be revealed -- the son of the destruction,Robert Young Literal Translation 1862, 1887, 1898 Info Darby - 2Th 2:3 - Let not any one deceive you in any manner, because [it will not be] unless the apostasy have first come, and the man of sin have been revealed, the son of perdition;J.N.Darby Translation 1890 Info ASV - 2Th 2:3 - let no man beguile you in any wise: for [it will not be,] except the falling away come first, and the man of sin be revealed, the son of perdition,American Standard Version 1901 Info HNV - 2Th 2:3 - Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction,Hebrew Names Version 2000 Info