Kṛṣṇa is not making lying propaganda. He has no business. He is giving you information, that if you become Kṛṣṇa conscious, janma karma me divyam, always thinking of Kṛṣṇa—how He is acting, why He has come, why He has appeared, why He has given us the Bhagavad-gītā, what lessons He is giving—in this way, if you simply try to understand Kṛṣṇa, janma karma me divyaṁ yo jānāti tat . . . in truth, not whimsically, not sentimentally; with sound philosophy, knowledge, argument, you try to understand Bhagavad-gītā as it is, then you get tyaktvā deham . . . then after giving up this body, undoubtedly you go back to Kṛṣṇa, go back to home, back to Godhead. This is the proposition, Kṛṣṇa consciousness movement.
Otherwise, these changes of Manu, changes of millennium, changes of devastation . . . in every . . . manvantara. At the end of Manu, there is another devastation. Pralaya-samplave, cākṣuṣa-samplave. After the span of life of Cākṣuṣa Manu, there is another inundation. And then again everything comes out gradually and the water dries. Just like you see the Pacific Ocean, it is drying. Of course, we shall not live, but if hundred years after, if somebody comes here, he will see that the Los Angeles city has expanded and the Pacific Ocean has diminished. This is going on.
In this way, one day will be . . . there will be no Pacific Ocean. And therefore, without water, everyone will die. Simply sunshine, bright sunshine. So then again, as there is after bright sunshine there is cloud and rain, similarly, again there will be rain. Then again there will be water. Samplave, inundation. This is going on. Bhūtvā bhūtvā pralīyate (BG 8.19).
This material world, these scientist, the rascal scientist, they are trying to save it, "How to run on our motorcar? How our grandchildren who are coming, how they will drive this motorcar?" They are thinking and trying to find out some energy. But the rascals, they do not know where they are going. He is thinking for the future grandchildren. What is the relationship with grandchildren? There are so many living entities, they are coming and going. Bhūtvā bhūtvā pralīyate.