Rumi said, There is no proof of the soul.
But isn't the return of spring and how it
springs up in our hearts a pretty good hint?
~ Mary Oliver from "Whistling Swans" in DEVOTIONS
It seems to me that a mountain is an image of the soul as it lifts itself up in contemplation. For in the same manner as the mountain towers above the valleys and lowlands at its foot, so does the soul of the one who prays mount into the higher regions up to God like an eagle taking wing.