What about what Paul said to the Corinthians?
"1Now, brothers, I want to remind you of the gospel I preached to you, which you received, and in which you stand firm. 2By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain." 1 Corinthians 15:1-2
It doesn't matter if a true believer can really stop believing or not. The necessity to do so remains.
Here is your teaching Dilemma.
* A believer is ANY man who believes. That man can believe today, Doubt tomorrow, not believe the next day, and the following day Again Believe.
* IS that mans soul saved? No.
* IS that mans spirit quickened? No.
* Say that SAME man, IS BELIEVING, on the day he bodily dies...
* Will that mans soul be saved THEN? Yes.
* That mans body will be buried....Begin rotting, Returning to dust.
* And what about his Saved Living soul?
* His Saved Living soul DEPARTS his dead body, and goes to Paradise, (heaven), and what?
* Waits in Comfort, FOR God Prophecy to be Fulfilled ON Earth.
* Waits for the day, his Body is resurrected, redeemed, glorified, so his saved living soul can return to his risen glorified body.
* Say that SAME man, IS NOT BELIEVING, on the day he bodily dies...
* Will that mans soul be saved THEN? No.
* What will become of his UNSAVED, departed living soul?
* His body shall be buried, rot, return to dust.
* His unsaved departed living soul shall go to hell, wait in torments, wait to the day, his unsaved soul is returned to his unglorified and risen body, TO STAND before the Judge and receive his righteous Judgement, of an unsaved living soul, and unglorified risen body.
ABSOLUTELY....THAT MAN, is taught, warned, in Scripture, TO HOLD ON TO HIS FAITH.......KEEP BELIEVING TO THE DAY his BODY drops Dead.
BECAUSE......IF He drops dead on a DAY, he is doubting, not believing...
His soul SHALL NOT BE SAVED.
WHAT does the WARNING have to DO WITH a “CONVERTED” man?
NOTHING!
A Converted man.........IS NOT “WAITING” to BECOME Saved AFTER he PHYSICALLY Dies.
A Converted man.........ALREADY bodily died, Crucified with Jesus.
A Converted man.........Already RECEIVED Salvation of his soul.
A Converted man.........CAN NOT, doubt, wonder, vacillate believe, not believe, believe, not sure, doubt.
A Converted man.........Does NOT REQUIRE Warnings....to make sure he is believing on the day he dies........HE HAS ALREADY BODILY DIED......! He is ALREADY a MADE NEW creature.
Your Scriptural Warning reference, APPLIES to a WOBBLY UNSURE man.
You may very well WARN a child to LOOK both ways to cross a street.
In essence what you are teaching is you would KEEP Warning that same child AFTER he has crossed the street!
A Converted man HAS ALREADY crossed the threshold of bodily Death, and Received His Salvation. He requires NO WARNING to KEEP Believing......Gods POWER IS IN THAT man, and KEEPS that mans BELIEF IN that man FOREVER!