Wave nature.
It is a nature associated with small particles, which posses mass and at the same time indefiniteness in its position, like an electron. It appears that the electron can be here and there at the same time. It also appeared to me that I am this and that in this very nature of me. Which calls in the question, "Who am I?". I think it is best if we take a position of Rango: "Who am I?, I can be anybody." It also strikes to me the idea of him drawing a box as though he's confined to a definite area... He goes out of box becoming "anybody", ending up being a legendary himself. This is what it is... despite of our wavery nature, when taken our whole life's account, we become our definite selves- no matter what.