Yet, around the world we all go about our lives in much the same way. There is the inner world of the human spirit and the outer world of the physical existence. But when you look at Nature itself, you see that it has no intelligence, no will. Thus fire is an abstract chemical reaction, a black and white happening outer world, but within the inner world, the fire is full of color and brings memories of cooking, warmth and fireside stories. The absence of light is darkness, so darkness as an object does not exist.
Darkness only exists as light exists.
Without light there would be no concept of darkness. To understand this more fully, consider that part of our mind is like a computer which creates a data structure of the outer world. Over time, man has evolved so the inner model of the outer world is a good one. Those who did not see correctly did not live long enough to reproduce. But the inner world is much more than a model of the outer world.