" Human beings are accustomed to feeding themselves only with solid, liquid and gaseous elements and what do they do with the fourth element, Fire and Light? Nothing. They have not learnt how to sustain themselves with light and yet it is even more necessary than air. As long as he continues to nourish his brain only with solid, liquid or gaseous elements (which the brain needs the least), man's understanding will be very limited. He may understand material things, but he will never be able to grasp the mysteries of the Universe"