Thought provoking! True, darkness does become light only if when light arrives. However, light never become darkness. Darkness is always waiting for light to go away to manifest itself. So, it seems light is the stronger force that always conquers darkness. Without light, there would be no lives, no plants, no energy, no vision.That is about the physical light and darkness outside around me.
I used to meditate in the bushes and mountains a lot few years back. The darkness inside of me becomes light when I am happy for no reason. In the midst of a storm, i am calm, observing myself from far distance in the space, not sure from within this galaxy or another. I observe all my thoughts, aspirations, my existence, my body, my place in this universe. In eternity, somewhere in this vast universe, there I am alone, not wanting to know what i am doing there, why i am there; just enjoying that brief moment which will expire on its own.