As far as we can tell, fundamental to Adam and Eve’s belief system is the notion that the cosmos is tiered. The earth is a middle ground layered between the dome of the sky and the shallow bowl of the underworld. The upper realms can be reached only in dreams and altered states, and usually only by a shaman—someone who acts as an intermediary between the spiritual and material worlds. But the lower realms can be accessed by anyone, simply by burrowing deep into the earth—by crawling, sometimes for a mile or more, through caves and grottos to paint, etch, and sculpt their beliefs directly upon
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