Devotee: It says in the Gītā when Kṛṣṇa... He comes to achieve a certain mission and then He leaves. In the Bhāgavatam it says that at the disappearance of Lord Kṛṣṇa everything fell down, everyone was dejected, and Arjuna was crying, in such... Well, if He comes to achieve a certain mission and then when He leaves it all falls down again...
Prabhupāda: Not immediately. Just like here the nature is working in that way. You build a very nice house. Gradually, the nature's course is it will become old and you'll fall down. This is the way of nature here. You cannot keep anything fresh always. So, so long Kṛṣṇa or God is present, or His representative is present, the affairs of the world go very nicely. But as soon as they disappear again the same system begins, dwindling. Begins... By the power... Just like so long the sun is there, there is no darkness, but as soon as the sun is away from your sight, at once the darkness comes. Because the whole atmosphere is darkness. It is by artificial means or by arrangement of God we are keeping it light. This room, if at once the electric fails, oh, it will be dark, because its nature is darkness. Its nature is darkness. Therefore Vedas say, 'Don't keep yourself in this darkness. Just get out of this. Come to the light.' Tamasi ma jyotir gama. Just come to the light.
That is spiritual kingdom. So Kṛṣṇa comes to give you information of that spiritual kingdom, that 'Life is like this.' Just like Kṛṣṇa displayed at Vṛndāvana. Everyone is happy, enjoying. So He displays the spiritual life to attract you. So our business should be to be attracted by Him and prepare ourself to go back to Godhead, go back to home. Not that because Kṛṣṇa came here, He has left some instruction, we shall stick here. You must give up this idea. Kṛṣṇa gives you opportunity how you can live peacefully here. But that does not mean that you make your permanent settlement here. Then you are doomed. You take the advantage of Kṛṣṇa's instruction and prepare yourself so that tyaktvā dehaṁ punar janma naiti: (BG 4.9) after leaving this body, no more coming here. Bas. You go. You are transferred to Kṛṣṇaloka. We should prepare in that way. That is the solution of problem. Otherwise, if you want to live in this material world, this nature is like that. Bhūtvā bhūtvā pralīyate (BG 8.19). It is manifested at a certain period, again it is destroyed. And there is destroying, I mean to say, process. So Kṛṣṇa comes, He sets right everything. But the nature of this world is like that. It becomes again deteriorated. Deteriorated. So? Let us have saṅkīrtana. Govinda jaya jaya gopāla jaya jaya.
(Srila Prabhupada Lecture, San Francisco, September 11, 1968)