In the second chapter of the Bhagavad-gita, Krnsa explains to Arjuna that even if one doesn't think the soul exists, one should not lament for anyone dying, because just like bubbles in the ocean waves, millions of people are born and die every moment. Lecturing from the second chapter Srila Prabhupada said, "?.material creation, just like bubbles in the ocean. You have seen standing on the bank of the Pacific Ocean, oh, so many thousands of bubbles created in a second, and again thousands of bubbles gone, in a second. Now, who is crying there?