(from Advaita Musings)
Total Darkness. We are in fact in Total Darkness. Out there there is no light, ie the sensations within the brain which we describe as light, which our vision is constituted off. This is because the sensation of light as we see it does not exist in nature. It exists only within the brain. Let us assume that there is a three dimensional world out there, with light sources reflecting off objects. The simple fact is light as you see it doesn't exist in nature, it is the effect of coded information exciting cells in the brain.