"The animal envoys of the Unseen Power no longer serve, as in primeval times, to teach and to guide mankind. Bears, lions, elephants, ibexes and gazelles are in cages in our zoos. Man is no longer the newcomer in a world of unexplored plains and forests, and our immediate neighbors are not wild beasts but other human beings, contending for goods and space on a planet that is whirling without end around the fireball of a star. Neither in body nor mind do we inhabit the world of those hunting races of the Paleolithic millennia, to whose lives and life ways we nevertheless owe the very forms of our bodies and structures of our minds. Memories of their animal envoys still must sleep, somehow, within us; for they wake a little and stir when we venture into wilderness. They wake in terror to thunder. And again they wake, with a sense of recognition, when we enter any of those great painted caves. Whatever the inward darkness may have been to which the shamans of those caves descended in their trances, the same must lie within ourselves, nightly visited in sleep."
Joseph Campbell, THE WAY OF THE ANIMAL POWERS