Acharya Prashant explains that as physically evolved creatures, humans have a fear of darkness because it has always been a threat throughout the course of evolution. This fear is part of our primordial psyche and continues to this day, irrespective of our technological progress and control over our environment. Even grown-ups are nervous and uncomfortable in absolute darkness, not just little babies. The fundamental reason for this fear is body-identification. Our most important and identified-with physical sense is sight, which becomes dysfunctional in darkness. When this primary sense stops working, the body-identified creature feels its very identity has become defunct. Our physical well-being, including our ability to defend against aggression and find food, is directly related to our ability to see, which requires light. This deep-seated connection is why "darkness" remains an unpreferred word in our vocabulary and may even be a hint at the origin of racism. The more body-identified a person is, the more threatening darkness will be to them. All our other identifications, such as with wealth, family, or achievements, are merely branches of the root identification with the body. In contrast, Truth is often referred to as light or brightness because it is the dispeller of fear. While physical light enables the eyes to see only objects, Truth is a special kind of light that allows for the perception of both the object and the subject together. Truth is described through negation as bodiless, muscle-less, and invulnerable. Our knowledge is confined to the bodily and material, as we cannot know anything that is not bodily through our senses. The mind itself is a subtle body, and all its tools, including imagination and words, are material. Therefore, one cannot imagine or speak of Truth, God, or freedom without reducing them to a material concept. The God that the tongue can speak of is no bigger than the tongue itself. All that the body can perceive are other bodies, and all that we can think of is bodily.