The Dao as a symbol (aka the Yin/Yang) is a representation of the inherent perfection and wholeness of all that is. The circular shape of the Dao represents absolute wholeness this inherently perfect and contains (yet transcends) all opposites. And then within the wholeness of the circle... there is a duality of positive and negative. And on the level of duality there is the concept of perfection and imperfection... infinite and finite... light and darkness... and all other dichotomies of the dualistic world. It is like the archetypal representation of the Sun and Moon... where the circle represents the Sun which is the Masculine and spiritual component of the Dao where all things are inherently perfect as they are. Then, the Moon has a dark and light side like the Dao... and this represents the more Feminine and Earthly components of the Dao where nothing is ideal and there is a world of contrasts and opposites where we have preference for "this thing" over "that thing". So the Dao is a representation of the relative duality that exists within (and as) the absolute non-duality of existence... It is similar to how both the relative finite and relative infinite are dichotomous component of the absolute infinite... and both the relative imperfection and relative perfection are components of the absolute perfection... and the relative separation and relative oneness are components of the absolute oneness. And with enough consciousness and a deep enough connection to truth and love, all dualities of the Dao collapse into an absolute perfection that transcends all dichotomous conceptualizations of "good and bad". And the light side of the Dao is only a meager reflection of infinite brightness of the Dao as a whole... just as the light side of the moon is a meager reflection of the intense brightness of the sun. This is how much dimmer the human conceptualizations of goodness are in comparison to the absolute goodness that includes all things... the good, the bad, and the ugly. So, if we are attached to conceptualizations and identities of relative goodness (in opposition to relative badness), then we cannot connect to the absolute goodness that transcends these relativistic dualities. This is why the Dao provides an excellent explanation of what's needed in Shadow Work. When we only look at ourselves and reality from the perspective of duality without respect to the non-dual... it seems like we live in a world of good and bad. And from that conclusion the name of the game is to condemn and annihilate the bad so that good may triumph. But this only leads to the dualistic conception of goodness in the relative (which is an incomplete goodness). And it often leads to all sorts of terrible things. For a complete goodness, you must embrace the whole and the positive and negative with it. This is what we do with Shadow Work. We embrace the absolute wholeness and recognize the perfection of our Self (and all things in reality) as an extension of the Dao (which is one and the same to the Self). And we avoid polarizing into incomplete identities of relative goodness and excluding the parts of ourselves that we perceive as bad. It is only then that we can undo the schisms within personalities to reveal the absolute perfection and radiance of the Self that transcends all dualistic conceptualizations of identity.