what is the constructed or shadow self?

what is the constructed or shadow self? Basically, it is the sense of separate identity — “me”, “mine”, etc. The constructed self or shadow self is basic to individual development and is not inherently bad in itself. In fact, it is necessary for both survival, and individuation (recognising who we are in distinction to others). Something can be initially known only in contrast to something that it is not. For example, a white dot with no border around it placed on an equally white background will not be visible — for all intents and purposes, it does not exist. But a white dot on a black background immediately leaps into appearance. In the psychological realm, the ego is what provides this basic contrast. “I am me, and you are you, therefore I exist.”