2 Thessalonians 2:3–4 ESV. 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 destruction, who opposes and exalts himself against every so-called god or object of worship, so that he takes his seat in the temple of God, proclaiming himself to be God.
The word “rebellion” here in the English Standard Version is translated in the NASB95 version as “apostasy” and in the King James as “falling away.” It is number 646 in the Enhanced Strong’s Lexicon.
ἀποστασία: apostasia, to forsake, falling away, defection, apostasy.
Clearly, Paul is saying that there is an apostasy before the man of lawlessness is revealed. But who is falling away from what? In other verses, rebellion or apostasy is applied to Israel departing from the worship of the God of Abraham, Isaac and Jacob. On the other hand, the Church applies this to itself (falling away from the Church) because they think they are a replacement for Israel. The problem with that is the Church is not in the Bible and has never been the point. Israel is the point. The Church has been falling away from God for centuries.
Hebrews 3:12–13 ESV. Take care, brothers, lest there be in any of you an evil, unbelieving heart, leading you to fall away from the living God. But exhort one another every day, as long as it is called “today,” that none of you may be hardened by the deceitfulness of sin.
In Hebrews 3:12, the phrase “fall away” is translated from a slightly different word meaning to “depart from,” “to desert,” “excite revolt,” or “become faithless” (Strong’s 868 aphistemi). It’s the same basic word as apostasy, just with a different spelling.
Hebrews 3:14–15 ESV. For we have come to share in Christ, if indeed we hold our original confidence firm to the end. As it is said, “Today, if you hear his voice, do not harden your hearts as in the rebellion.”
The rebellion referred to by the writer is the one where Israel refused to go into the Land as instructed by the Lord through Moses. He is equating this rebellion to the concept of apostasy.
Hebrews 6:4–6 ESV. For it is impossible, in the case of those who have once been enlightened, who have tasted the heavenly gift, and have shared in the Holy Spirit, and have tasted the goodness of the word of God and the powers of the age to come, and then have fallen away, to restore them again to repentance, since they are crucifying once again the Son of God to their own harm and holding him up to contempt.
In Hebrews 6, the phrase “falling away” is a different Greek word transliterated parapipto but means ultimately the same thing – to depart from worship of the God of Abraham, Isaac and Jacob. It can also mean to deviate from the right path, turn aside or wander, all of which are just a little more descriptive in describing apostasy.
Israel, at the time of Paul, was generally trying to follow God, even if not the Messiah Jesus the Christ. Paul was working very hard to reach as much of Israel as he could with the good news of God with us, and many thousands had converted, but the majority still wanted to go it on their own. This resulted in the failed rebellions against Roman authority of 70 A.D. and 135 A.D. The rebellion against Roman authority was much different than rebelling against God, although in those rebellions both were combined.
The falling away mentioned in Thessalonians is most likely a falling away from God by Israel, before an agreement is made by the Beast with Israel just before he is exposed for what he really is. In my understanding, the falling away spoken of by Paul will also be the result of Church congregants finding out that their leaders have been lying to them for centuries, or people in Israel choosing to side with the Beast, or both. All the nifty philosophies of men that church or genetic Israel buys into will be revealed as so many illusions.
Falling away from God is not the same as falling away from the Church. A person who simply attends Church or is part of physical Israel never was “saved” (John 3). A person can go to church or synagogue for a lifetime and still not be saved. Salvation is permanent, but the evidence of salvation is a life that is dedicated to following all of our Father’s instructions.
Simply being a member of a non-biblical club or a genetic group is not salvation. Most congregants of any Church or synagogue have been misled into thinking that their group is equivalent to the Body of Christ (or the Kingdom of God) and so apostasy is a hard idea to swallow. But The Church and synagogue are just a man made organizations with a few cultural appropriations from the Bible pasted on and have not taken the place either of Israel or the Body of the Christ.
When the average superficial follower of God or denier of Jesus of whatever stripe finds out that the whole of God’s Word has always been a part of salvation, some will decide to follow but many will be resentful and fall away. Believing in Jesus without doing what He says; not believing in Jesus as the Messiah; believing genetics alone gets you in the kingdom; a rapture that doesn’t happen when you think; a tribulation to endure and so on will cause a massive disillusionment with leaders of all flavors.
Matthew 24:10–11 ESV. And then many will fall away and betray one another and hate one another. And many false prophets will arise and lead many astray.
Jesus uses another word to describe falling away which is transliterated as skandalizo (Strong’s 4624). It means literally to “offend,” or “entice to sin” and even “to cause to fall away.” Apparently, before the Beast is revealed there will be pressure to abandon the God of Abraham which includes “lawlessness.” This factors into the meaning of the other words to give us an idea that the lie or strong delusion (2 Thessalonians 2:11) will add to the pressure of falling away by many. Some of those who fall away may find salvation anyway, so those of us who are mature will need to help them if possible.
Shalom