At the time of death the Yamarāja will come and take us to the hellish condition. Therefore foolish people they want to forget that there is next life. No, there is next life. We are discussing every day. Next life is there. We are every moment getting a different body. This is the scientific study. I do not know why they cannot understand. This is biology. Biology means we are, every moment we are getting a new body. This is biology.
So we have to give up this body and we have to accept another body. So labor or work for such body which will no more be material body. This is intelligence. Mad-yājino 'pi yānti mām (BG 9.25). Next body means as we are acting, according to the resultant action of our activities, we get next body. Karmaṇā daiva-netreṇa jantur deha upapattaye (SB 3.31.1). How you get next life? In this life we are acting in a certain way, and by nature we shall get a similar body. Nature's law is so perfect that the law you... Just like infection. I have several times explained. You infect some disease, the disease will come out. Not that somebody will come to award you the disease. By nature's way, it will come out. If you say that "Somebody will come," no. The nature's law is so perfect. Just like if you touch fire, immediately it will burn, not that you have to wait. Similarly, nature's law. It is stated in the Bhagavad-gītā, prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27). As you are associating with different modes of material nature, you are creating your future.