Kṛṣṇa says here, yogaṁ yuñjan mad-āśrayaḥ. Yogam. Mayy āsakta-manāḥ. The business is that we have to increase our attachment for God. This is our main business. We are attached to so many things. That is material life. Everyone has got. Therefore we have got different types of body. Kāraṇaṁ guṇa-saṅgaḥ asya sad-asad-janma-yoniṣu (BG 13.22). Why you have got different types of body? The kāraṇam, the reason, is that we are associating with particular type of infection in this material world, and we are getting particular type of body. I have explained it several times that there are three guṇas: sattva-guṇa, rajo-guṇa, tamo-guṇa. So in the Bhagavad-gītā it is said, kāraṇaṁ guṇa-saṅgaḥ asya. As soon as we are in the material world, we are under the influence either of these three guṇas: sattva-guṇa, rajo-guṇa, tamo-guṇa. Those who are purely in association with the modes of goodness, sattva-guṇa, they are considered as brāhmaṇa. And those who are associated with the rajo-guṇa, passion, they are called kṣatriyas. And those who are associating with the tamo-guṇa, ignorance, they are called the śūdras. And the mixture of tamo-guṇa and rajo-guṇa is the position of the vaiśya. In this way, there are four divisions of men everywhere. Cātur-varṇyaṁ mayā sṛṣṭaṁ guṇa-karma-vibhāgaśaḥ (BG 4.13). According to the association of particular type of modes of nature and working in that way, it makes a division of the human society. That is required.
For upkeep of the human society in order, according to the quality and work, there must be division. But that is not that division as we are thinking at the present moment in India—a man is born in the brāhmaṇa family, he is brāhmaṇa. No. He must have the brahminical qualification. That is first consideration. Śamo damaḥ satyaṁ śaucam ārjavaṁ titikṣā, jñānaṁ vijñānam āstikyaṁ brahma-karma svabhāva-jam (BG 18.42). That is the verdict of the śāstra. Not by birth. Birth is a facility. If you have the opportunity to take birth in a brāhmaṇa family, then you have got the best opportunity to acquire the brahminical qualification. Just like a person born as the son of a medical man, from the childhood he is learning all the medical terms and how his father is treating patient. So before entering medical college he is half medical man. That is the facility. But if we don't take the facility, we go astray. . . They are called brahma-bandhu. And if we have acquired the qualification of a śūdra, then, even though one is born in the brāhmaṇa family, he should be accepted as śūdra. Similarly, if a person is born in a śūdra family, but he has acquired these qualities, śamo damaḥ satyaṁ śaucam, he should be designated as brāhmaṇa. That is the injunction of the śāstras in many places. So if by force I want to assume myself as a brāhmaṇa or kṣatriya without qualification, that is the cause of India's cultural ruination. Such a high Vedic culture of India is now ruined because we have misused the terms. That is the cause.