I am not offended by your response. Now can you explain what those three Scriptures I posted mean? Or are you also going to avoid what Jesus and Paul taught about apostasy?
BTW, I do not believe a person who is saved will practice a sin, however I do believe that a Christian can be a prodigal for a season. If a person claims to be a Christian and then goes into, lets say homosexuality and adopts gay theology, and does not eventually repent then he has become an apostate since he willingly chose this world over God's truth.
However, here is a link an online Geneva Bible. Now go check out those verses yourself and don't accept someone elses word for what they say. You also need to understand the Geneva Bible does not use modern English, it was pubished in 1599. So what would departure mean to the translators? Was it the rapture, a doctrine that surfaced in the 1830's? Could it be possible that Jack and his friends are looking for verses to prove a pre-trib rapture? It might work for the 2 Thessalonians Scripture but not for the 1 Timothy 4 Scripture.
The word translated apostosy in the NAS is
NT:646
apostasia (ap-os-tas-ee'-ah); feminine of the same as NT:647; defection from truth (properly, the state) ["apostasy"]:
KJV - falling away, forsake.
(Biblesoft's New Exhaustive Strong's Numbers and Concordance with Expanded Greek-Hebrew Dictionary. Copyright (c) 1994, Biblesoft and International Bible Translators, Inc.)
NT:647
apostasion, apostasiou, to,
1. divorce, repudiation: Matt 19:7
2. a bill of divorce: Matt 5:31
(from Thayer's Greek Lexicon, Electronic Database. Copyright (c) 2000 by Biblesoft)
Did you take the time to read the Matthew Henry Commentary I linked to? I have found that older commentators are more reliable in their eschatology than modern commentators since they don't have an ax to grind, like a pre-trib rapture.