So people are being controlled by the three kinds of material nature, and if they do not follow the śāstric injunction, then he will concoct, he will create something according to his position, either in the tamo-guṇa or rajo-guṇa or sattva-guṇa. But those . . . means superficially doing something in the tamo-guṇa, he will not be successful. He will not be successful. Yaḥ śāstra-vidhim utsṛjya vartate kāma . . . (BG 16.23).
He is going on, conducting himself under the influence of the same modes of nature, material nature, which he has naturally adopted from his birth. There are . . . we have discussed all these in this verse, that sad-asad-janma, yoni-janmasu. Kāraṇaṁ guṇa-saṅgo 'sya (BG 13.22).
Everyone is getting a particular type of body. So one may say: "This body is very nice," "This body is not so nice," and "This body is very good." So why it is so? Because according to the association of the material nature. After all, the living entity falls down from the spiritual world. Just like Jaya-Vijaya. There is possibility, if you do not stick to the spiritual principle, even if you are in Vaikuṇṭha you will fall down, what to speak of this material world? Because in the Vaikuṇṭha, or in the spiritual world, no contaminated soul can stay there. He will fall down.
Now, when the spirit soul falls down? Just like Jaya-Vijaya. Jaya-Vijaya became asura. They fell down from Vaikuṇṭha. But they became asuras under the circumstances. That is mentioned, I was reading Bhāgavata, the Kaśyapa Ṛṣi, his wife . . . Diti? What is the name of? Anyway, she was very lusty during the sandhyā, just at the point of evening, the day's passing. So she wanted sex with her husband. He said: "No, this is not the time. This is not the time." But she was so lusty she obliged the husband to have sex life with her, and the result was two asuras was born. We have to take so much care. You see? According to the time, according to circumstances . . . therefore the Vedic principle has got garbhādhāna-saṁskāra. To beget a child, it requires also reformation—time, mentality, situation. So . . . not like cats and dogs. So creating the background very nicely, sattva-guṇa, they will beget a child. That child will come, some great man, now great devotee. So everything has got the material relationship, how to do it. That is śāstra. You do it, but follow the śāstric injunction.