In the depths of the unconscious, the old, long-established life patterns are eternally repeated; at the same time, nature is also continually producing new forms, undertaking new experiments. There are still embryonic, unfinished structures to be found within the living individual of the present day, and that these, far from being meaningless, actually bear the germs of significant new forms whose nature we cannot even guess.
~ Esther Harding, Psychic Energy: Its Source and its Transformation, 1963, p. 120