This material world is . . ., means we have created so many unwanted things. This is material world. Just like we are living in this part of your country, a village. So you are living very happily, undoubtedly. There is ample opportunity for living peacefully here. You grow little grains, you get some milk, some vegetable, and all your economic questions solved. But as soon as you go to the city, the whole pollution attacks you. You have to give up this simple eating process. Instead of drinking milk, in the city you'll have to cut throat of the cow and eat the meat. So in this way we shall be implicated with so many sinful activities that our life will be entangled.
On account of your foolish civilization we do not understand what is the entanglement of life. The entanglement of life is described in the Bhagavad-gītā, tathā dehāntara-prāptiḥ (BG 2.13), to change this body. As we are changing body—the child is changing body to become a boy, the boy is changing body to become a young man, the young man is changing body to become an old man—similarly, when the old man changes the body, he gets another body. If a young man challenges the laws of nature, that he is not going to be old man, that is false prestige. He must have to become an old man. Similarly, if some rascal says that "I don't believe in the next life," that is his foolish thinking. He has to change his body. Nature's law is going on. You are not controller of the nature; you are controlled by nature. So if we entangle ourself with sinful activities, then next life means we get low-grade life. It is said in the Bhagavad-gītā:
- ūrdhvaṁ gacchanti sattva-sthā
- madhye tiṣṭhanti rājasāḥ
- jaghanya-guṇa-vṛtti-sthā
- adho gacchanti tāmasāḥ
- (BG 14.18)
Means those who are very pious, they are promoted to the higher planetary system. Those who are ordinary, they remain with the middle planetary system. And those who are very abominable, sinful, they go down planetary system or become lower than human being—animals, trees, birds, beasts, like that. So they have no sense. Their so-called scientific understanding has no, I mean to say, advancement of knowledge. They do not inquire even wherefrom these living entities are coming, the trees, birds, beasts, lower than human being; wherefrom they are coming they do not inquire.