The materialistic way of life means nidrayā hriyate naktam. At night either sleep or enjoy sex. Nidrayā hriyate naktaṁ vyavāyena ca... (SB 2.1.3). Vyavāyena means sex. And in daytime? Diva cārthehayā rājan. In daytime, "Where is money, where is money, where is money?" Go, take your car and run. So diva cārthehayā rājan, and when you get money, kuṭumba-bharaṇena vā. Then find out, purchase something for my wife, for my children, for myself, spend the money. Again night comes, again sleep, again sex. Again day comes, all right, go to market, earn money and spend it. This is going on. This is called material life.
So it is very difficult to convince the people of the modern days how they are wasting their time, how they are risking their life by this way of irresponsible life of material existence. They are thinking that "The more I enjoy sex, the more I enjoy sleeping, that is perfect. That is my profit." And to convince them, "No, it is simply loss, you are simply risking your life," it is very difficult. But this is the fact. This is the fact, in this way, because in this duration of life, human, if I do not make my life perfect, stop the materialistic miserable condition, namely janma-mṛtyu-jarā-vyādhi (BG 13.9)—birth, death, old age and disease—then I am missing the opportunity. Next life will be given by the laws of nature. Just like you are in the forest, you see so many trees are standing. You do not know how many years they will stand. Yes. It is possible. If I have acted just like a tree, nonsense, no-sense... Just like tree has no sense. If you cut it, he does not reply. Because practically it has lost the senses. There is some senses, consciousness, but it is not developed. It is not developed. The animal, little more developed. The human, fully developed. This is with all the consciousness, stages of different consciousness. And when we come to the stage of Kṛṣṇa consciousness, this is perfect. Otherwise, in the lower grade. So if we neglect in this life, human form of life, to develop our Kṛṣṇa consciousness, then there is chance to become an animal, to become a tree.
So people do not know this, how this science is working, but this is the fact. Prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27). Tathā dehāntara-prāptiḥ (BG 2.13). So we have to read all these things very carefully. Tathā dehāntara-prāptiḥ, there is dehāntara, another body. So we must be very careful what kind of body I'm going to get. Now, this life I have got very nice, beautiful body and everything is all right, but if we act irresponsibly, the nature will give me a suitable body. Otherwise, why there are so many varieties of life, 8,400,000? So we should be very, very careful not to waste the duration of life even by a second. We shall eat less, then we shall sleep also less. Nidrāhāra-vihārakādi: then our sex appetite also will be less. Unnecessarily eating, unnecessarily sleeping is not required at all. That is the practice by the Gosvāmīs. Nidrāhāra-vihārakādi-vijitau **. They conquered over eating, sleeping. Mating, there was no question: they were sannyāsīs, renounced order of life. And defense also, there was no question because they depended on Kṛṣṇa, the most powerful defender. So there was no question of defense. Simply two things, eating and sleeping. And that they also conquered. Nidrāhāra-vihārakādi-vijitau cātyanta-dīnau ca yau. So spiritual life means you have to control. That is called gosvāmī. One who has control over the senses, one who has control over eating, you'll find this instruction in the Nectar of Instruction: jihvā-vegam udaropastha-vegam manaso vegam etān vegān yo viṣaheta dhīraḥ pṛthivīṁ sa śiṣyāt (NOI 1). Guru should be... Guru means one who has control over the six engagements. Manaḥ, to control the urge of the mind. The mind wants to do this. "No, if it is not profitable, don't do this." Then control over the mind. Control over the senses, control the words. I am angry, I want to abuse somebody with some ill names. "No, why shall I..." Control of the... Talking unnecessary useless talk, that is control over the tongue. Vāco vegam. Krodha-vegam: "I am just going to be very angry upon you." No, we have to control. In this way when one is able to control over these things, especially jihvā-vegam udaro-vegam upastha-vegam, straight line—the urge of the tongue, the urge of the belly and the urge of the genital—then we become svāmīs, gosvāmīs. Artificially, it is not to be suppressed. Nidrāhāra-vegam, these are material things.