A mythology is, in this sense, an organization of metaphorical figures connotative of states of mind that are not finally of this or that place and time… The second best are misunderstood because, as metaphors poetically of that which cannot be told, they are misread prosaically as referring to tangible facts.
Campbell defines mythology as an organization of metaphors pointing to inner states, and identifies the literal misreading of those metaphors as the root of spiritual misunderstanding.
, The Inner Reaches of Outer Space: Metaphor as Myth and as Religion, 1986thesis