It’s easy to perceive the duality of Black Swan. I mean, the main protagonist is suffering visions that lead most people to believe it’s about schizophrenia. To draw this conclusion, all one has to do is decipher the names of each “personality” to find the true mean, Nina and Lily, which mean radiance and dark respectively, in ancient Hebrew. However, where the duality really lies, is in the abstract of art as a phenomenon — all art having two sides, the creative and the destructive. When you look back at the movie with that in mind, it makes a whole lot of sense.