| "Two energies are working in this material world: the spiritual energy and the material energy. The material energy means these eight kinds of material elements. Bhūmir āpo 'nalo vāyuḥ: (BG 7.4) earth, water, fire, air, sky, mind, intelligence, and ego. These are all material. And similarly, finer, finer, finer, finer, and grosser, grosser, grosser. Just like water is finer than the earth, then fire is finer than the water, then air is finer than the fire, then sky, or ether, is finer than the air. Similarly, intelligence is finer than the ether, or mind is finer than the ether. The mind... You know, I have given several times example: the speed of mind. Many thousands of miles within a second you can go. So the finer it becomes, it is powerful. Similarly, ultimately, when you come to the spiritual part, finer, from which everything is emanating, oh, that is very powerful. That spiritual energy."