When we think of in terms of Vedic civilization—the brāhmaṇa, kṣatriya, vaiśya, śūdra—this is very scientific. Because a class of men, very intelligent, very pure, ideal class of men, brāhmaṇa, must be there. That is Vedic civilization. People will see and learn. Because ultimately, human life is meant for elevating to the standard of spiritual consciousness. Athāto brahma jijñāsā. So unless in the society there is an ideal class of men, brāhmaṇa, how people will learn it? That is necessary. You cannot say: "Let us all become technologists, śūdras, that you can get money for purchasing wine and meat." But the ideal life is lost. Ideal life is lost. There must be. Just like if you want to keep your body fit for everything, there must be brain. If you say that, "There is no need of brain. We simply want legs," so how . . . what is this body? A dead body. There must be the head, there must be the hands, there must be the belly, and there must be the legs. So brāhmaṇa is the head of the society, brain of the society, and the kṣatriyas are the arms of the body, and the vaiśyas, the belly of the body. The stomach and the belly must be kept in order. If you do not eat, if you do not digest your food, the brain will not also work, hand will not also work.
So for proper upkeep of the human society there must be a brahminical class, brāhmaṇa class, the kṣatriya class. They are all equal, because my hand is as much important as my brain. But although comparatively my brain is more important than my hand, that is comparative. But you require the brain. So at the present moment, why the society is chaotic condition? Because there is no brāhmaṇa. That is the defect. So society must be divided in the material stage of this brāhmaṇa, kṣatriya, vaiśya, śūdra. And gradually, everyone should be educated to become brāhmaṇa. Athāto brahma jijñāsā. Brahma-bhūtaḥ. Then he will understand what is bhakti.