This Ajāmila is a learned brāhmaṇa. He is vidvān. He is not a fool. But vidvāṁsam api karṣati. Therefore it is forbidden, mātrā svasrā duhitrā vā, "Don't keep yourself in a lonely place and talk 'pish-pish' with woman, even she is mother, daughter or sister." Strictly forbidden. That "pish-pish" will kill you. Therefore it is forbidden that, "Don't talk in solitary place with woman, even she happens to be your daughter, your mother and your sister." Generally one is not agitated in sex with mother, with sister, with daughter. But it is forbidden up to death. Even Brahmā became agitated by seeing his daughter. There is instances. Even Brahma, and what to speak of others?
So mind is so susceptible that . . . but this mind can be controlled only by Kṛṣṇa consciousness. Yoginām api sarveṣāṁ mad-gata anāntarātmanā (BG 6.47). Mad-gata, thinking of Kṛṣṇa, āntarātmanā, within the core of heart. Mad gata anāntarātmṇā, śraddhāvān bhajate yo māṁ sa me yuktatamo mataḥ: "He is first-class yogī." So unless we can control the mind, we cannot become yogī. Yoga means indriya-saṁyamaḥ. Yoga means not reducing fat or this or . . . no. Yoga means controlling the mind, controlling the senses, and concentrate it upon Viṣṇu, Kṛṣṇa.