Darkness only exists where light is not present. Light illuminates everything that it touches, and eliminates darkness by its very presence – without fight or struggle.
With respect to hidden emotions, darkness is anything that has not been observed by individual awareness. But since emotions are what inspire expansion and guide us toward it, just having life experiences creates more dark shadows to be illuminated by our presence.
In the perspective of Yin Yang (balance), when we are not present in our lives, the shadows of darkness proliferate and create imbalance. But there is no danger of too much Light because new shadows are constantly being created as a necessary component of the ever-expansive nature of the Universe.
Enjoy the darkness. It gives meaning to the Light.