a few things that come to mind when pondering duality:: opposites, magnetism, dichotomy, polarity, contrast, contrary, Yin yang, positive & negative, masculin & féminin ego & soul, 3D self & higher self, Left brain & right brain, night & day, summer & winter black & white, red & blue, hot & cold, love & fear knowledge & ignorance, material & etheric visible and invisible, all is nothing & nothing is all? haha, there's a lot of perspectives and interpretations of this whole concept of Duality. What's the true meaning? Do both parts really make up the whole? what about once upon a time on earth when it was spinning on its axis evenly and there was the united super continent of Pangea and there was no winter weather to compare to the hot summer days? what if people at that time were not dualistic in their makeup and among their counterparts?.. what about even before that time there was no moon to contrast with the sun? what if there doesn't need to be evil in order for there to be good? what if the true essence of being or creation on a whole is not dualistic in nature? i see duality as an interesting and useful tool in viewing things, but some dualistic aspects may quite possibly be a control mechanism used by archons. We need to realize and reconcile the duality within ourselves.. there seems to be light and dark aspects in our psyche and given free will choice, there's no telling what people will choose sometimes.. the ego is a huge factor in all of this on top of social conditioning /engineering and the traditional collectivist archaic behaviors we can't seem to learn from and outgrow of.. that's what doing the shadow work is about, shining light on that darkness and coming into balance, harmony and alignment to Truth and Universal Law. This is part of the alchemical process in this lifetime of yours, bon courage!