Anything in this material world, what is that? Tejo-vari-mrid vinimayam. An exchange of fire, water, and earth. Tejo-vari-mrid vinimayam. Exchange. You take earth, you take water, mix them, and put it into the fire, it becomes brick, then powder it, it becomes cement, then again combine them, it becomes a big skyscraper building. So as this material world, anything you take, it is simply a combination of these three ingredients, plus air and sky for drying. Air is required for drying. So combination of the five elements. Similarly, this body is also combination of five elements. There is no difference. But because in the big skyscraper building there is no soul, it stands in one place, but the body has got the soul, therefore it moves. That is the difference. The soul is the important thing. But they do not know. Just like we have manufactured the airplane and there is no soul, but another soul means the pilot. He takes care of it. He drives. Therefore, it is moving. So without soul, there cannot be any movement. Either the thing must have soul or some other soul will take care of it. Then it will move. Therefore, the important is the soul, not this material body.
Lecture on Bhagavad-gita 2.25, London, 28 August, 1973