Apostasia is about rebellion against faith in Christ. to say.
That would be the spirit of Anti-Christ, and that Spirit was "already in the world", in the days of the Apostles.
So, this "falling away", verse, is one of those verses that is argued by scholars for hundreds of years.
If you were in my class i'd teach this verse to you in a way you have not heard it before., and this is because i base it on something Jude said, and something Paul teaches.
So, READER, i'll tell you what i teach my students, and you can then add this to your rolodex inventory regarding what the verse means..
Here is what is says.....>"a great falling away".
So, that means, that something previously believed, is now no longer held as REAL belief.
Now, can this be the world of unbelievers? = No.
And that is because they have no faith or truth to fall from...
They are in this situation...>"LOST"....."DECEIVED"......"MIND BLINDED"......so, what would they fall away from ????, as they are already "adamic nature" "fallen", and hell bound. John 3:6
So, this verse has to be talking about the Church.
Now Look at Jude...........Jude says....>"contend earnestly for the REAL FAITH".
Now that is a very important verse... critically important to discern...as that is making a literal distinction between Real Faith and "doctrines of devils", Hebrew 13:9.
So, there is REAL FAITH, or the teaching that Paul gives that He calls ..."My Gospel".
So, anything that pretends to be "how to become a Christian", and "how to remain a Christian".... would be a false faith if its not the Real Faith stressed by JUDE...... and this "doctrine of Justification" is only found "in the time of the Gentiles", as provided by the Gentile Apostle, Paul.
Are you following me reader?
This means... "REAL FAITH", is what Paul teaches as "justification by faith"...which is..>>"The Gospel of the Grace of God".
So, anything that departs from this real faith, or "falls from this" or "fallen from Grace", regarding falling from Real Faith, is to apostatize from REAL FAITH>. ...is to "fall away".
= There is your falling away. Its a large percentage of the Body of Christ, leaving real faith, and become "fallen from Grace"
Notice. "falling away"............and ... "Fallen from Grace"..
See that?
They are the same.
Which is.... the leaving of the Gospel of Grace, by the Majority of The Church, based on subversion of the Real Gospel as its changed into "water baptism", and all types of "commandment keeping Gospel", and all types of "self effort to stay saved" Gospels that have no root of faith in Christ, and are literally become "fallen from Grace" doctrines "of devils". Hebrews 13:9
Paul said that the "simplicity in Christ", is the revealer of those who are "fallen away".
Those of you who have no idea what that is, might want to pay attention to what im showing you.....
Here is the verse.....>> 2nd Corinthians 11:3.......Paul says that believers become departed from real faith...
That is the "falling away",...... and in the end times, just before the Grt Trib starts, as the "time of the gentiles" is ending, there is a HUGE departing from real faith into all types of subverted gospel(s) that are all about Mary, and Water and enduring, and anything that is taught as a Gospel of SELF EFFORT to Stay saved to go to heaven.
There is your falling away., and its been here in the Body of Christ for quite a while.
I'l give you a prime example.
You can go to any Christian forum, in the world, as of '2021...... and im on them all or have been for quite a few years, (2004) and you can't find 5 members per forum who believe this......>"The blood of Jesus that saved you, KEEPS YOU SAVED".
But you can find nearly the entire forum including the mods that are caught up in "pre-destination", "water baptism", and nearly every person on a Christian forum will argue that Christ's blood does not keep you saved.
And they will show you their misused and twisted verses that talk about commandments, and water, and self effort, and Sacraments,
Any and everything that is NOT RELATED to the Cross of Christ and Jesus's BLOOD and Death, which is ONLY GOD's GRACE saving you and keeping you saved.
They are fallen away from this real faith, and are glad to explain it to you as their self saving LEGALISM.
So, the "falling away" is LEGALISM that has infected the entire body of Christ.