Most personally convincing reasons you don't believe.

[Athene]

Yep:
Romans 10:9 (KJV) That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.


Romans 10:10 (KJV) For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

Salvation is only the means  by which one is saved, IMO; Easily lost or forfeited.
That was my take, anyway.

Then put it back.. (your take away) Into context. (see above)

We're talking about two different things here. 

The words 'salvation' and 'saved' aren't always interchangeable, Drich. Salvation also has it's own stand-alone definition that makes more sense within a Biblical context as the way, means, path or process in which to be saved; Not the actual act of being saved itself.

"Salvation" occurs as a result of accepting the atonement of Christ.

By accepting Christ's atonement, one is (generally) regarded as worthy of being in God's presence, and thus "saved" from permanent separation from Him in the end.

Unless there's some reason to believe that your God would just start evicting individuals out of heaven, once they've already been accepted into his kingdom after final judgement, then sure; Once saved, always saved makes sense. But, if one no longer possesses the faith or belief required to accept atonement, then the way in is clearly gone; Salvation go bye-bye.

Anyhow, this specific line of discussion seems to involve little more than quibbling over semantics, in my opinion.