Yes but "Paul".... "GOD" did not become true just because the bible was written.. he was ALWAYS there !! Since the beginning of time !!

It is not that when the bible was written all of a sudden "Heaven" and "God" magically started to appear... He was always there. Way before people STARTED to write about it.

Therefore, IF you believe in the bible.. or actually to put it more clearly, IF you believe in "GOD" then you do believe in "HIS" heaven...

And therefore, "ACCORDING" to the bible, the "Idea" of Heaven.. a heaven with GOD, came frome Christianity.. as it was the same God that created Adam and Eve and everything in the beginning...