So 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's spiritual energy. That is given in the Bhagavad-gītā. What is that spiritual energy? That spiritual energy is this living entity. Apareyam itas tu viddhi me prakṛtiṁ parā (BG 7.5).
Kṛṣṇa says, "These are material energies. Beyond this there is another, spiritual energy." Apareyam. Aparā means inferior. Apareyam. "All these described material elements, they are inferior energy. And beyond this there is superior energy, My dear Arjuna." What is that? Jīva-bhūta mahā-bāho: "These living entities." They are also energy. We living entities, we are also energy, but superior energy. How superior? Because yayedaṁ dhāryate jagat (BG 7.5). The superior energy is controlling the inferior energy. Matter has no power. The big airplane, nice machine, is flying in the sky, made of material things. But unless the spiritual energy, pilot, is there, it is useless. It is useless. Thousands of years the jet plane will stand on the airport; it will not be flying unless the small particle spiritual energy, that pilot, comes and touches it. So what is the difficulty to understand God? So plain thing, that if this huge machine... There are so many huge machineries, they cannot move without the touch of the spiritual energy, a human being or a living being. How can you expect that this whole material energy is working out of automatically or without any control? How you can put your arguments in that way? That is not possible. Therefore less intelligent class of men, they cannot understand how this material energy is being controlled by the Supreme Lord.