By understanding Kṛṣṇa as it is stated in the Fourth Chapter—janma karma me divyaṁ yo jānāti tattvataḥ—simply by understanding Kṛṣṇa, one becomes so much elevated that after quitting this body, material body, tyaktvā dehaṁ punar janma naiti (BG 4.9), he never accepts again this material body. As I have already explained to you that our miserable conditioned life is this—that we have to accept every fifty years or sixty or utmost hundred years, we have to accept another body. We may make very good arrangement in this life, nice bungalow, good bank balance, nice family relationships, everything. But the thing is that we shall not be allowed to stay. Aśāśvatam. Duḥkhālayam aśāśvatam (BG 8.15). Therefore all our attempts to become very happy within this material world is futile. The intelligent man should know this, that "I want permanent settlement in my life, but that is not being done." Only intelligent man can understand because intelligent means to understand that we are all eternal. Why should we accept this temporary body? We must have our eternal body. That is possible. You can have your eternal body like Kṛṣṇa. At the present moment, although we are eternal, we have to accept a certain type of body which is not eternal. Asann api kleśada āsa dehaḥ (SB 5.5.4). Asann api. This body is temporary, but it is very miserable. It is always giving us trouble. That we should know. Janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānudarśanam (BG 13.9).
So in the human society there must be some program how to cultivate such knowledge which can give me relief from this repeated birth and death. That is perfect human society. Otherwise those who are being carried away by the waves of material nature like cats and dogs, that is not proper human society. Human society means which society is making advance in spiritual knowledge, the Aryans. The Aryans means those who are advanced in spiritual knowledge. They are called Aryans. Ārya. Kṛṣṇa says, manuṣyāṇāṁ sahasreṣu (BG 7.3). There are 400,000 species of human beings, different types of human beings.