Human life means religion. Dharmeṇa hīnāḥ paśubhiḥ samānāḥ. The cats and dogs, they have no religion. But if the human being has no religion, then he is no better than the cat and dog. Therefore all over the world, either he's a European or American or Indian or Canadian or Russian, everyone has got some religion. It doesn't matter whether it is Hinduism, Muslimism or Christianism. Because human society without religious conception—religious conception means to understand God—he's animal. Dharmeṇa hīnāḥ paśubhiḥ samānāḥ. So gradually, the whole world is becoming animal because they are rejecting religion. They are rejecting religion. Therefore Kṛṣṇa says, dharma-saṁsthāpanārthāya sambhavāmi yuge yuge. Because these rascals, they give up religion and become animals and fight between themselves and make the whole world a confusion and chaos, therefore it is required that Kṛṣṇa comes. Dharma-saṁsthāpanārthāya. This is His duty. He has no duty, but it is His mercy that He comes. Dharma-saṁsthāpanārthāya.
And what is that dharma? In the Bhāgavata it is explained, dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19). You cannot manufacture a religious sect. That is rascaldom. Just like if you think, "I shall manufacture law at my home," is it possible? Who will care for your law? If the law is enacted by the state, that is accepted. The government says, "Keep to the left." You have to accept it. You cannot say, "No, why not to the right?" Then you'll be criminal. Similarly, laws means given by the government, and dharma means which is the codes given by God. That is dharma. Dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19). That is religion. And Kṛṣṇa says, dharma-saṁsthāpanārthāya sambhavāmi yuge yuge: "I come to reestablish. When people become cats and dogs without any religion, then I come down to establish religion." Because we are Kṛṣṇa's sons, we are all sons of Kṛṣṇa, He is very much anxious to see us happy. Just like father wants to see his sons, bewildered sons, to see that he is happy. Paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām (BG 4.8). That is also the same thing. To deliver the righteous person and to kill the demons, the same thing, because Kṛṣṇa is absolute. His maintaining the devotee and killing the demon, both of them are same thing.