Darkness is a symbol of evil or mystery or fear. The darkness is almost a monster waiting to swallow you whole. It is the absence of light. Scientifically it is only possible to have a reduced amount of light. The emotional response to an absence of light has inspired metaphor in literature, symbolism in art, and emphasis. The story of the Light versus the Darkness is one that everyone thinks that they know. The Light is good and the Dark is bad. However, this is too broad of a generalization, for not all of those who follow the Light can be considered to be "good," and many good people do indeed follow the Dark, you may even know a few yourself.