Please explain why Paul wrote "is revealed" in verse 3 but also wrote that it cannot happen until verses 6-8 come to pass.
Also please explain why Paul wrote in verse 6: "and now you know..."
You should know that words can have more than one meaning.
Finally, the Greek word, apostasia, does NOT tell what is being departed from. Why they would you insist on believing it is a falling away from truth or from Jesus? It must be you are adding to the written word to make it say what you expect it to say. My my!
You should know this: “Moreover if your brother sins against you, go and tell him his fault between you and him alone. If he hears you, you have gained your brother.
But if he will not hear, take with you one or two more,
that ‘by the mouth of two or three witnesses every word may be established.’ And if he refuses to hear them, tell
it to the church. But if he refuses even to hear the church, let him be to you like a heathen and a tax collector. Matthew 1*:15-18
“By the mouth of two or three witnesses every word shall be established.” 2 Cor 13:1
FOUR Faithful WITNESSES Testify of the "falling away/departure from the Truth" - Here they are one more time for you
The 'Falling Away' is Departure from the Truth
JESUS said it first - Matt 24:9-10
Then they will hand you over to tribulation and kill you, and you will be hated by all nations because of My name.
And at that time
many will fall away, and they will betray one another and hate one another.
PAUL said it - 2 Thess 2:1-3
Now, brethren, concerning the coming of our Lord Jesus Christ and our gathering together to Him, we ask you, not to be soon shaken in mind or troubled, either by spirit or by word or by letter, as if from us, as though the day of Christ had come. 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,
The HOLY SPIRIT said it: 1 Timothy 4:1
Now
the Spirit expressly says that in latter times some will
depart from the faith, giving heed to deceiving spirits and doctrines of demons,
JOHN said it: 1 John 2:18-19
Children, it is the last hour; and just as you have heard that the antichrist is coming, so now many antichrists have appeared. This is how we know it is the last hour.
They went out from us, but they did not belong to us. For if they had belonged to us, they would have remained with us.
But their departure made it clear that none of them belonged to us.
Anyone who says the falling away/departure is a 'pre-trib rapture of the church is in error, great sin and danger of judgment.