We are in this material world under the clutches of the modes of material nature, and according to different circumstances we are mixing with different modes of nature. Kāraṇaṁ guṇa-saṅgo 'sya sad-asad-yoni-yoniṣu (BG 13.22). Because we are mixing with different types of material nature, next life we are preparing. Tatha dehāntara praptir. We have to accept another body. Kāraṇaṁ guṇa-saṅgo 'sya. This is our position. Don't be very happy that "Today I am such and such big person. It will continue." No, sir, it will not continue. Tathā dehāntara-prāptiḥ (BG 2.13). You have to change your body.
So we have to understand this responsibility of life. That is human life—not to enjoy senses by imitating the hogs and dogs. This is not human civilization. We have to learn from the śāstras how our life is being transformed from one form to another, and there are 8,400,000 different species of life. Once this human form of life missed, and if you are put into these waves of birth and death, then the opportunity finished. We must always be alert that we have got this responsibility. The Ṛṣabhadeva says that tapo divyaṁ putrakā yena śuddhyed sattva (SB 5.5.1). Sattva means existence. Your existence is eternal. That is the first information in the Bhagavad-gītā. Na hanyate hanyamāne śarīre (BG 2.20). Na jāyate na mriyate vā. This is the first instruction. There are so many commentator or instructor of Bhagavad-gītā, but they are missing the first instruction. They are not interested that "What is going to happen my next life?" They are not interested. Nobody takes care. They have concluded they have no life after death. This body is finished, everything is finished. Most irresponsible life. This is not to be carried on. Ṛṣabhadeva says that "My dear sons, don't live this irresponsible life like animals, hogs and dogs, but take the responsibility of human life. Undergo austerities, penances, as they are recommended in the śāstras, and make your life . . ." It is individual. If this movement cannot be taken massively, every individual can practice it. That is Indian culture. Every Indian was educated how to become a brāhmaṇa, for coming to this platform of austerity. And following the examples of brāhmaṇa, the kṣatriya and the vaiśyas and the śūdras, they also benefited.