In the Bhagavad-gītā it is also said that those who are intelligent person, those who are making progress to become wiser, for them four things should be kept always in view. What is that?
Janma-mṛtyu-jarā-vyādhi-duḥkha-dosanudarśanam (BG 13.9). We may think very . . . that we are very safe and we are making good advancement in economic development, but there is no solution for these four problems, as enunciated by Bhagavad-gītā, janma, mṛtyu, jarā, vyādhi. Oh, there is no solution for birth. There is so much attempt for birth control all over the world, but still, in every minute or in every second some percentage of population is increasing.
Janma, mṛtyu. Similarly, there are so many attempts to discover scientific measures to stop death, but it is not possible; death is taking place. Rather, in the present age, death is taking place earlier than in years before. Formerly people were living, say, hundred years, eighty years, ninety years, and nowadays a man is living, utmost, seventy years, sixty years. If a man lives for eighty years, then he is considered to be very . . .
But time will come, as we get information from Śrīmad-Bhāgavatam, that at the end of this age, Kali-yuga, if a man lives for twenty to thirty years he'll be considered as the grand old man. So practically we are not making any progress. And materially it is not possible to make any progress. It is . . . that is called māyā, illusion. We are actually not making any progress, but we are thinking that we are making progress. This is called spell of māyā.