|"The particular business of human being is stated in the Vedānta-sūtra: athāto brahma jijñāsā. So these four principles of life, āhāra-nidrā-bhaya-maithunam, there is no difference. Only difference is a human being can inquire about what is God, or what is Brahman, athāto brahma jijñāsā. That is the only business of human life. So a cat, a dog cannot inquire about Brahman, but the gentleman inquire about what is God. Because he is human being he could inquire like that."