Biologically . . . here is our friend, Dr. Ghosh. He knows very well. There is no difference biologically between human body . . . medical students in the biological department, they study from the frogs, from guinea pig, the human constitution of the body. There is no difference. But what is the difference? Not this bodily construction, but development of consciousness. That is the difference. So if we do not develop . . . that is the opportunity, human life. In human life there is the opportunity to develop Kṛṣṇa consciousness. Therefore śāstra says that nāyaṁ deho deha-bhājāṁ nṛloke, "In the human society the body is not meant for spoiling in sense gratification like the cats, dogs and hogs." Don't create a hog civilization. That is the warning. What is hog civilization? Hog civilization means there is no restriction of eating, up to the stool. The hogs eat up to the stool. So when in the human society there is no restriction of eating, that is hog society. And there is no restriction of sense gratification or sex life, that is hog society. Because the hogs, they eat up to stool, and there is no sex restriction. They do not know whether mother, sister or daughter, they are . . . not matter. You will see it. Therefore it is specifically said, nāyaṁ deha, kaṣṭān kāmān na arhate viḍ-bhujāṁ ye (SB 5.5.1). The . . . still the hog you will see loitering in the streets whole day and night, "Where is stool? Where is stool? Where is stool? Where is stool?" Whole day and night. At night also you'll see. Those who have got experience to pass stool in the villages, you go at dead of night, and the hog will immediately come standing. As soon as you leave the place, immediately, "phus, phus, phus," they will eat.
So this kind of hard labor simply for satisfying the tongue and the genital, that is hog civilization. That is warned by Ṛṣabhadeva, nāyaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān arhate. Why? Kāmān means eating, sleeping, sex life and defense. These are kāmān, bodily necessities of life. As soon as you will get this material body, you will have to eat. In the spiritual body there is no eating. The eating means to sustain this material body. You will find many saintly persons, practically, they do not eat. Raghunātha dāsa Gosvāmī, he was eating at Rādhā-kuṇḍa, every two . . . after two, three days after, he was eating little butter, just to satisfy. Practically no eating. Raghunātha dāsa Gosvāmī was a very rich man's son. His father's income was twelve lakhs of rupees in those days. So he adopted this austerity at Rādhā-kuṇḍa.
So actually that is the fact, that in the spiritual life there is no eating, no sleeping, no sex life, no defense. These are all material necessities. So material necessities, we have got, and the hogs and dogs, they have also got. So if we work also like dogs and hogs day and night for sense gratification, material satisfaction, then where is the difference between hogs and dogs and human being? And this is going on. We are accepting this civilization as advanced. The more you have got facility for sense gratification, it is to be understood that you are advanced. So that advancement means to give satisfaction to the body.