Throughout the Saga, we hear characters repeatedly mention the Dark Side of the Force and how it can grant one "unnatural" abilities; how fear, anger, and aggression lead to it; and how it is easier and more seductive. However, I was wondering, do any of the characters ever reference a "Light Side" of the Force? The closest thing I can think of is Luke asking, "but how will I know the good side from the bad?" or Qui-Gon mentioning the Living Force. It's a thought I had because I tend to think of the Force as a binary, with the Dark Side and the Light Side being two sides of the same Force. But if there is no "Light Side" and there is only "the Force," then the Dark Side is merely a perversion of the natural Force and this very much clarifies Lucas' analogy of the Dark Side as being a cancer.