Originally Posted by theShape
I've always loved the idea that Batman and the Joker represented complete archetypal opposites, despite being quite similar psychologically. Batman is the ying to the Joker's yang. Both the worlds' greatest hero and villain, if you ask me.
Well put. It's for those reasons that Joker's lines like "You complete me" and "I think you and I are destined to do this forever" have such deep meaning and resonance because they are a ying/yang relationship.
It's like black vs white. Order vs chaos. Even the comics touched on that;