Well i didn't exactly decide it . It is more like i realized it when i started to understand Gods word as a letter written to each of us . Did God think i would ever need a mountain to actually be moved no ,But he did want me to know that any problem in my life even one that seemed as big and impossible to over come as moving a mountain could be done with faith in him .<quoted text>
So how do you decide that the "mountain" in that story is a metaphor but in other stories, like Jesus "rising from the dead" or "feeding the multitude with a few loaves and fishes" or the stories of Adam and Eve or Noah and the Ark are to be take literally?
How about they are ALL metaphors? Never meant to be taken for real.
The other things you mentioned should be taken literally because they happened .