I think God looks at the heart of a matter when it comes to salvation. He knows who has a softened heart, who has the spirit of His, who really is all in, in all that is said, thought and done. I believe the bible is a very profitable tool He uses to get us where we need to be, which is in Him. I think He is the salvific issue. We must be believing, and unless on our deathbed at at the time repentance, He calls us to sanctification. A process that can be quite uncomfortable, even downright painful. The gain is rooted in Him and the resulting fruit belongs also to Him.
There are so many things in the bible that seem unbelievable...the talking donkey, Jonah hanging out in a whale, and lived to tell the story, the serpent's ability to deceive in the garden, the many miracles, the worldwide flood and how about the arc filled with every creature. The words manifestations played out since the dawn of time is another whoa factor to consider. Let's not forget about His resurrection, the greatest of all unconcievable truths. I don't understand God how could I, I am just one of His created beings. However, He generously shares nuggets of His info, His attributes and patterns, His Holiness, His Mercy, Goodness and Love, not to mention His righteous judgements. I think when it comes to believing in Him and in His truths, in the historical data given, we should be astonished and delighted, oh so encouraged to see and to fully believe...
just how accurate it is that with God all things are possible.