Light, in the context of the universe, is the origin of all being. The pure source. Your origin and your roots. What you deeply are, your own inner divine self, is light. If you look at the universe and everything that is in it, ultimately everything is made of light. Thus, not only your essence, but also your body, your mind, the nature and the matter that surrounds you, they all consist of light. Light is, ultimately, the source and the main component of all life, all spiritual and all matter.