On the face of it, I disagree that "the thread of salvation through the Messiah runs throughout the whole" of the Bible. I found that the Dead Sea Scrolls support my position:
The messiah, according to Jewish [and early Christian] belief, was not a God that would deliver his people by clearing their way to heaven. The messiah was to be an empowered King who would destroy the enemies of the Jews and regain their Holy Land.
Yet the Messiah was for everyone who believed. So how would an earthly kingship be available to those who had passed already? People want it now. So, they misinterpret a lot.
The Revelation in the Bible sets it out rather plainly in some ways. The book of Hebrews is another that helps. St. Paul's writings suggest that we don't know what form we are going to take in Heaven.

off a book that was written when people knew squat about science. Don't you understand that? Your house is built on a foundation of cards.