From "Betsey's Retreat: The Power of Twin Soul Love Book II"

""The shadow," wrote Jung, in 1963, is "that hidden, repressed, for the most part inferior and guilt-laden personality whose ultimate ramifications reach back into the realm of our animal ancestors and so comprise the whole historical aspect of the unconscious" (cited in Diamond, p. 96).
These shadows dance within us in dreams or fantasies and without us by showing up in feelings and behaviors we don't understand. The soul is a wilderness unknown."