Paul makes the argument for a Pre-Tribulation Rapture by showing us the three events that must first take place. Paul shows us that the Rapture is one of those events.
2 Thessalonians 2:1-8
Rapture, Pre-Trib Rapture, Tribulation Period, 2nd Coming Of Jesus, Great Falling Away
These are the end times and The bible tells us many will fall away from truth and sound doctrine
1 Timothy 4:1-3
False Doctrine, Warning The Church, False Doctrines, Coming Deception, Great Falling Away