Okay so you're saying it's not impossible to bring them back to repentance? That contradicts what it's saying. The previous part "have committed apostasy" is certainly in past terms. Once you've FALLEN AWAY(isn't that past?). It doesn't say "If you're falling away". It says "If you have fallen away". There's a finality to the state of fallen away. Yes when they've fallen away they enter a present state of ongoing apostasy but that does not mean that magically later they can repent when it clearly says there's in impossibility. If anything the present term indicates that it will continue and never change.
Would you at least be able to see the logic in what I'm saying?
Also the parable about the prodigal son, lost coin, and lost sheep is NOT talking about believers being dead again and then being "refound". It's talking about Christ seeking after lost sinners. They are dead but they are God's children. Jesus clearly teaches that if you're His child you will come to Him. You simply aren't aware that you're His child yet. However if you became a Christian and then fell away, you were never His child. Just like 2 Peter 2:19-22 says "A dog returns to it's vomit and the pig returns to wallowing in the mud." The dog was always a dog and the pig was always a pig. They were never sheep.
A. "Once you've fallen away (isn't the past)"- correct logic as it is a past tense event.
B. "Later they can repent when it clearly says there's in impossibility" - incorrect logic.
B (conclusion) does not necessarily follow A (premise).
The proper understanding is that they have
fallen away upon commencing and continuing to sin which is the
reason for the Greek present tense verb = habitual sin that evidences no repentance whatsoever. Thus the "impossibility" is derived from the fact that they continue sinning. It simply means as long as there is habitual sin without repentance - it is impossible to restore them back to repentance.
It does not state if they ceased sinning and repented, it is impossible to restore them back. Peter fell away and denied the Lord not once but thrice. Yet he was later restored. If I as a genuine believer, develop an alcohol or drug problem or any other habitual sin, are you claiming that it is impossible to stop sinning, seek repentance and be forgiven/restored? I would find that hard to believe.
Your claim referencing the parables in Luke 15 is unsupportable based on the text. You neglected to explain how the prodigal was made alive AGAIN. One can only be made alive again, if only one was made alive (regenerated in the Spirit) in the first place. After being
spiritually dead though habitual sin such as the prodigal was, one can return in repentance to the father and be made ALIVE AGAIN. Logic dictates that being made alive
again can never apply to lost sinners who were never initially made alive in Christ.
Same thing with the parable about the lost sheep. The lost sheep was part of the flock of 100 sheep v.4 but was lost and became separated from the other 99 sheep. This 99 sheep are referenced in v.7 as
"just persons who need no repentance." This means that the lost sheep was originally part of the 99 other sheep who NEED NO REPENTANCE and not a "lost sinner" who has not come to Christ yet as you claim. Those who need no repentance can in no way refer to unsaved, lost people. The lone sheep who needed no repentance wandered away this flock and became lost because of sin. As a result, that lost sheep is labeled as a SINNER, v.7 and is spiritually dead. However, there is joy in heaven now that that the sinner/lost sheep has repented and restored to the flock, v.7.
Jesus therefore taught that one can be saved, become lost (sheep) or dead (prodigal) but upon genuine repentance be forgiven and restored to a right relationship with God.
Lastly ironically, you use the very same argument that those who hold to OSAS use. They use the excuse that those who fall away were never his children in order to claim that those who are his children can never fall away. While it is indeed true in some scriptures that
some who fell away, were never his children to begin with, it does not logically follow that
all who fall away were never his children. That would be a logically fallacy of over-generalizing. Akin to saying that because some chickens lay brown eggs, all chickens lay brown eggs. There are those who fall away because they were never saved to begin with - but there are also those who fall away because of unbelief and/or sin.