Devotee: "A transcendentalist should always try to concentrate his mind on the supreme self. He should live alone in a secluded place and should always carefully control his mind. He should be free from desires and possessiveness."
Prabhupāda: Yes. This is the beginning of transcendental life. This chapter, Lord Kṛṣṇa will try to teach the principles of yoga system. So here he begins. That a transcendentalist should always try to concentrate his mind on the supreme self. Supreme self means Kṛṣṇa or Lord. He is the supreme self, as I just explained, nityo nityānāṁ cetanaś cetanānām (Kaṭha Upaniṣad 2.2.13). He is the supreme eternal. He is the supreme living entity. So the whole yoga system is to concentrate mind on the supreme self. We are not supreme self. That you can understand. Supreme self is God. This is dvaita-vāda. Duality. Duality means God is different from me. He is supreme. I am subordinate.