Kṛṣṇa began this teaching to Arjuna first of all, aśocyān anvaśocas tvaṁ prajñā-vādāṁś ca bhāṣase (BG 2.11): "You are talking like learned scholar, but you are lamenting on the body, which is not at all important." Nānuśocanti. Here also the same thing. Tasmād evaṁ viditva enam, this body, na anuśocitum arhasi. Do not be very much serious about this body. The soul is the subject matter to be considered. But the modern civilization, they are concerned with this body. Just the opposite.
Kṛṣṇa says because the soul is immortal, therefore tasmād evaṁ viditvā, understanding of this principle, enam, this body, na anuśocitum arhasi. The real factor is the soul. We have to take care of the soul, not of the body. So far body is concerned, there are pains and pleasure like climatic changes. Āgamāpāyinaḥ anityāḥ, such bodily pains and pleasure come and go; they are not permanent. Tāṁs titikṣasva bhārata. So you have to learn how to tolerate these bodily pains and pleasure, but you have to take care of the soul.
But the modern civilization, they have no knowledge of the soul, what to speak of taking care of it, and, like animals, they are in the bodily concept of life, taking much care of the body, but they have no information of the soul, and what to speak of taking care of it. This is the lamentable condition of modern civilization. Animal civilization. The animals simply take care of the body, has no information of the soul. So this civilization is animal civilization, mūḍha. Mūḍha means animal, asses.
Now if we say to the people in general, they'll be angry upon us, but actually this is the position. Yasyātma-buddhiḥ kuṇape tri-dhātuke (SB 10.84.13). I've several times explained this verse. Yasya ātma-buddhiḥ. Ātmā means self; buddhi, has taken this body as self. Yasyātma-buddhiḥ. But what is this body? The body is nothing but a bag of tri-dhātu—kapha, pitta, vāyu—and its by-product. By mucus, bile and air, by interaction of these three things . . . just like this material world, this house. What is this house? Tejo-vāri-mṛd vinimayam. Anything in this material world, what is that? Tejo-vāri-mṛd vinimayam. An exchange of fire, water and earth. Tejo-vāri-mṛd 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.