I believe salvation can be lost and I believe in rebirth; not as you understand it though. I'm sorry to disappoint you but I'm very secure.
Seems to me—after thinking about this a great deal—a person who has to rely on an unscriptural belief like eternal security is far more insecure than someone who doesn't.
Give it time. Your view will change on the matter. In a sense, this sounds a lot like Eph ch 1 does it not?
Eze 11:19
And I will give them one heart, and
I will put a new spirit within you; and
I will take the stony heart out of their flesh,
and will give them an heart of flesh:
Eze 36:26
A new heart also
will I give you, and a new spirit
will I put within you: and
I will take away the stony heart out of your flesh, and
I will give you an heart of flesh.
Jer 31:31
Behold, the days come, saith the LORD, that
I will make a new covenant with the house of Israel, and with the house of Judah:
Heb 8:8
For finding fault with them, he saith, Behold, the days come, saith the Lord, when
I will make a new covenant with the house of Israel and with the house of Judah:
Heb 8:13
In that he saith, A new
covenant, he hath made the first old. Now that which decayeth and waxeth old
is ready to vanish away.
Heb 12:24
And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than
that of Abel.