Although this may not particularly answer the question as it actually was meant, and I apologize if so, the Ra Material states that we are literally all things, so we are both polarities at once in full. "You are every thing, every being, every emotion, every event, every situation. You are unity. You are infinity. You are love/light, light/love. You are. This is the Law of One."
Our mind/body/spirit complex alone, however, as I understand it to be, can only be one polarity at a time, but may shift between polarities at any time, and the more polarized it is the easier it is to convert itself.
Our mind/body/spirit complex alone, however, as I understand it to be, can only be one polarity at a time, but may shift between polarities at any time, and the more polarized it is the easier it is to convert itself.