Sāstra says, therefore, nāyaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān arhate viḍ-bhujāṁ ye (SB 5.5.1). Śāstra says ayaṁ deha, this body, human body . . . nāyaṁ deho nṛloke, deha-bhājāṁ nṛloke. Nṛloke means in the human society. The animals . . . nāyaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān arhate viḍ-bhujāṁ ye. Viḍ-bhujām means an stool-eater animal, stool-eater animal, hog. You know. Although it is not very easily found in the cities, in our Indian villages, there are so many stool-eater hogs loitering in the street, in the village. The only business is, "Where to find out stool?" This is the business. Whole day and night they are working, to find out stool. So if human being is educated to find out his eatables . . . of course, the hog's eatables are the stool. They like it very much, very palatable thing. Similarly, we also, for some palatable things, we also work day and night. But śāstra says, na ayaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān arhate. Why this human society should be trained up to work so hard simply for eating, sleeping, mating and defending? This is not good.
Then what is it meant for, human life? Tapa. Tapasya. Tapo divyaṁ yena śuddhyet sattvam (SB 5.5.1). The human life's business is to accept tapasya, voluntarily accepting some inconvenience of life. That is called tapasya. Tapa means some trouble. Just like to become brahmacārī, it is tapasya. Just like we are prescribing this formula: "No illicit sex, no intoxication, no meat-eating, no gambling." People want to do it. People want illicit sex. The whole city is full of pictures, simply how to indulge in illicit sex. Then meat-eating—big, big signboard—and intoxication, wine shops. They want it. That is the natural propensity. Loke vyavāyāmiṣa-madya-sevā nityā hi jantor na hi tatra codanā (SB 11.5.11). You do not require to encourage them in these things. They have got natural tendency. That is material world—to enjoy unrestricted sex life, to eat meat, fish eggs, āmiṣa . . . āmiṣa-madya-sevā. Āmiṣa means eat meat, fish, eggs. These are āmiṣa. And vegetarian means nirāmiṣa. So āmiṣa-madya-sevā. Madhya means intoxication. Either wine or cigarette or bīḍī or gāñjā, bhāṅg, teas, coffees, they are all intoxication. So āmiṣa-madya-sevā and vyavāya. Vyavāya means sex life. You do not require to educate them. In the school, college, the boys and girls are not, I mean, given lesson . . . of course now, I think, they are now giving lesson also. But naturally, without any lesson, they know how to do it. Similarly, without an education, one can take to intoxication. So these things are natural. But when we try to stop these material instincts, that is called tapasya, tapasya.
So human life is not to be carried away by the so-called natural instinct. Natural instinct, material life . . . there are two kinds of natural instinct. So long we are in the bodily concept of life, there are different natural instincts, and when we come to the platform of spiritual understanding, that natural instinct is different. That is real natural instinct. So that natural instinct, spiritual natural instinct, can be attained by tapasya. Tapo divyam. That is the instruction of Ṛṣabhadeva. Now, people may say that, "Why we should undergo this tapasya, austerities? If we want to enjoy life, why we shall voluntarily give up this and undergo austerities?" No, there is reason. Tapo divyaṁ yena śuddhyet sattvaṁ yasmād brahma-saukhyaṁ tv anantam. It is very reasonable. You have to undergo tapasya, voluntarily restraint. That is called tapasya. So why? Now, yato śuddhyet sattvam. Your existence will be purified. "What is the wrong in my existence?" But that we cannot understand; that is called illusion. There are so many wrong things. Always we are in miserable condition. The summary miserable condition is, as described in the Bhagavad-gītā, janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānudarśanam (BG 13.9). That is intelligence that, "I am now put under . . . although I have solved all my problems . . ." But Kṛṣṇa says in the Bhagavad-gītā, "You have solved all your problems by your so-called scientific advancement; that is all right. But where is your solution of janma-mṛtyu-jarā-vyādhi, repetition of birth, death, old age and disease? Where is your solution?" This is very intelligent question.
Kṛṣṇa says therefore that, "You have solved all the problems of miserable condition of life. That is all right. But you should always keep in front these problems, prominently: janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānu . . ." Janma, the tribulations of janma, to live within the womb of the mother, everyone we have suffered, but we have forgotten. Similarly, we are awaiting another suffering at the time of death. That is also suffering, janma-mṛtyu. Then, when we take birth, we get old. That is also suffering. And we suffer from diseases. But as we are spirit soul . . . that is described in the Bhagavad-gītā: na hanyate hanyamāne śarīre (BG 2.20). The spirit soul does not die after the annihilation of this body. That is our position. We are accepting different types of bodies, but we are eternal, part and parcel of the Supreme. Not only eternal; full of knowledge and blissful. This is our position. But at the present moment, because we have got this body, it is not very pleasurable condition. It is miserable condition. There are adhyātmika, adhibhautika, adhidaivika miseries, and always we are under. That we cannot understand. We are thinking that "Things go on like this. Don't bother about these things. Go on. Eat, drink, be merry and enjoy." That means we are living very foolishly. Although the problems are there . . . I do not wish to die; the death is there. I do not wish to be within the womb of my mother, but I am forced to take a body within the womb of my mother. Then when I get the body, I come out, I am subjected to so many tribulation on account of this body—old age, disease and so many.
So actually, this is the problem of living entities, and that knowledge can be acquired in the human form of life and it can be solved, not that simply we get the knowledge, but it can be solved. So therefore, real business of human life, to understand oneself, that is called self-realization, brahma-bhūta (SB 4.30.20), and find out the remedy and act accordingly. That is the mission of human life. Not like to dance like cats and dogs with a nice dress. That is not human life. This is the subject matter of Bhagavad-gītā, our whole Vedic instruction. Vedaiś ca sarvair aham eva vedyaḥ (BG 15.15). This is God consciousness, Kṛṣṇa consciousness, or self-realization. Self-realization means either you see yourself or see the Supreme Lord, either way. But without seeing the Supreme Lord, you cannot see yourself. Just like without seeing the sun in the darkness . . . just like it is now night. There is no sun. So I cannot see also. In darkness I cannot see also myself. But when there is sun in the morning, I can see the sun and I can see myself also. This is the theory. So if we want to understand ourselves rightly that, "I am spirit soul," ahaṁ brahmāsmi, then we must take to Kṛṣṇa consciousness.