Dvau bhūta-sargau loke daiva āsura eva ca (BG 16.6). There are two kinds of men throughout the whole universe. There are men in other planets also, they are very highly elevated. They are therefore called devas, or demigods. The moon planet, the sun planet... There are many other heavenly planets. There is sun-god. In the Bhagavad-gītā you will find the name of the sun-god, or the predominating deity of the sun planet, Vivasvān. His name is Vivasvān. Everything you will find in the śāstra. So there are two divisions: asura and sura, or asura or deva. Devāsura. Deva means those who are conscious of the responsibility of life. They are called deva. So for the devas, Kṛṣṇa has explained so many things. Now He is explaining about the asuras. What are the symptoms of asura? He says first of all, pravṛttiṁ ca nivṛttiṁ ca janā na vidur āsurāḥ. Pravṛttiṁ nivṛttim (BG 16.7).
Now, as soon as we have got this human form of life, we have got different desires or we accept something as very nice. We reject something as not very good. This discriminating power is there. Even in animals there is this discriminating power. Just like a pig. A pig, if you give him halavā and if you give him stool, he would like to eat stool than the halavā. You will find it, natural. He has got natural inclination to eat stool. And a human being will be naturally inclined to take halavā. So this is called pravṛtti and nivṛtti. So the member of the Kṛṣṇa consciousness society, if you offer him tea, he will not take it. And others, if you offer tea, he will very gladly accept it. This is called pravṛtti and nivṛtti. So the pravṛtti and nivṛtti... Why a person is not accepting tea or smoking or something else, and why other person accepting the same thing? Amongst the animal also, you give something to animal. He will reject and another thing he will accept. These two things are there in every living being: accepting something and rejecting something. This is called pravṛtti and nivṛtti. So far the human form of life is concerned, there must be some pravṛtti and nivṛtti. There is that inclination, pravṛtti and nivṛtti, but they should be synchronized, systematized, what things we should accept and what things we should reject. That we must learn. Therefore we have got so many books, literature, education, what things we should accept and which things we should reject. But what is the basic principle? Why I shall accept something and reject something?
The basic principle is to go forward in our spiritual understanding. That is the basic principle. We are suffering in this material world. We may say that "We have no suffering. It is very pleasing," but actually, in every step we are suffering. Just like this is winter season. To take bath in the winter season is suffering. And in the summer season, to take bath in the summer season, it is very pleasing. So either we are suffering or we are enjoying according to different season and circumstances, but actually we are suffering. Because... Take this winter season. We do not want chilly cold. Therefore we are covering. The cause is we are suffering. Therefore we are covering. And after covering, we are feeling some pleasure. This pleasure is, for the time being, absence of suffering. That's all. Actually, we are suffering, but by some arrangement, when we stop that suffering for the time being and feel, enjoying, that is material enjoyment. Actually there is no enjoyment. Because in the winter season by covering the body we are feeling pleased but in the summer season by covering the body we feel not pleased. So this is going on. So rejecting and... Why the same dress, warm dress, does not give us pleasure in the summer season? And the same dress, in the winter season it gives us pleasure. So we do not know whether dress is pleasing or suffering. Means sometimes it is pleasing and sometime it is displeasing.
Similarly water. We do not know whether water is pleasing or displeasing. Sometimes it is pleasing; sometimes it is not pleasing. Everything. Mātrā-sparśās tu kaunteya śītoṣṇa-sukha-duḥkha-dāḥ (BG 2.14). So in this material world, actually we are suffering either in summer season or winter season, or any other season, with dress or without dress, with water, not water. The cause is going on, suffering only, but we are trying to cover this cause of suffering, and by temporary stopping the cause of suffering, we are thinking that we are enjoying. But actually there is no enjoying in this material world because you will find in the Bhagavad-gītā this material world has been described as duḥkhālayam aśāśvatam (BG 8.15). It is for suffering. Even if you do not take very seriously about this winter season or summer season, suffering or enjoying, at the end, either you accept these temporary sufferings and enjoying... Ultimately we are suffering. Ultimately we are suffering. How? Because we will have to die. Who wants death? Does anyone want death voluntarily? No. As soon as there is any cause of death, immediate death, we become very much sorry. Suppose you are sitting in a airplane and you understand, "Now it is going to be crashed," are you..., will you be happy? No. Why? Because you are going to die.
Suppose you are on the sea and it is going to sink in the water. Will you be happy? No. That time we chant Hare Kṛṣṇa. Sukhe... Duḥkhe saba hari bhaje, sukhe bhaje kaya.(?) When we are in danger... In Japan you have got many times the experience of earthquake, earthquake. What do you do at that time? Huh? You all Japanese boys and girls, what do you do? Have you experienced earthquake? You have? What do you do at that time? (pauses waiting for an answer) When there is earthquake, what do you do? Hmm? But I have seen in America. They all, everyone, they scream. (laughter) And perhaps they remember about God. Naturally they will remember, "God save us. God save us." What is your...? That means that we do not wish to die. That's a fact. You cannot say that death is very good thing. Nobody will say. Death... But we have to die. There is no excuse, that "I shall not die." Death is "as sure as death," they say. But you don't want death. This is suffering.
Not only death, even in lifetime... Just like we are old man. Who wants to become old man? Everyone wants to remain youthful. This is undesirable. This is suffering, actually suffering, because we are old man. We suffering so many diseases, so many inconveniences. If I am not helped by three, four men, then I cannot move even. So this is suffering. Old age is suffering. And diseased condition. Apart from death and old age, the diseased condition. Suppose you are suffering from some disease, some fever. So this is inevitable. You cannot avoid disease, you cannot avoid old age, you cannot avoid death, and you cannot avoid birth. So suffering... The whole material world is full of suffering. Duḥkhālayam aśāśvatam (BG 8.15). And even if you make it... Suppose at any place you are living it is not very comfortable, but if you are assured that you will not die, you will not be diseased, you will not become old, you will not take birth again—if there is no death, there is no question of birth—so even if you are assured of...it is called? Immunity from these sufferings, still, there are many other sufferings.
Suppose you are not thinking very well. Today my mind is very disturbed. That is called adhyātmika. I have got some pain in my body. That is also adhyātmika. Some friend or some animal has done some mischief to me. That is also suffering, adhibhautika. And adhidaivika. The earthquake. Nobody wants earthquake, but there is earthquake. This is adhidaivika. There is famine. There is pestilence. There is so many thing. So even if we are assured that we are not going to die, still, there are other sufferings. And, of course, there is no question of not dying. Everyone will have to die. Even you accept this place of suffering and if you are assured that you will live here permanently, still, you become happy, "All right, I will not die." But that is also not possible. Therefore aśāśvatam. Even if you make your arrangement very nicely that you will not suffer, but you will not be allowed to stay. Now just like in Tokyo city we are making very big, big buildings, everywhere, all over the world, to live very comfortably. But that comfortable life is also not assured because you will have to die. You will have to die. Therefore it is called aśāśvatam, not permanent. Even if you are under the impression that "I am very happy," that happiness also will not be allowed you for eternal time, it will be finished.