Īśvara, the Supreme Personality of Godhead, Paramātmā, is sitting in everyone's core of the heart, and He is witness, witnessing everything. So according to our karma, we are getting a body or a machine for movement given by māyā. So therefore we are getting different types of body. The reason is kāraṇaṁ guṇa-saṅgo 'sya sad-asad-janma-yoniṣu (BG 13.22). The different types of body we are getting on account of association with the material qualities. So if we want to stop this business of repetition of birth and death in this cycle, we must understand. Mām eva ye prapadyante māyām etāṁ taranti te. We must understand. It is compulsory. We must understand "What is God, what is my relations with Him." Then we can get release from this repetition of birth and death. That process is being described by Bhagavān Himself, that mayy āsakta-manāḥ pārtha. You have to increase your attachment for Bhagavān. Āsakta. Āsakta means attachment. You have to increase your attachment for Bhagavān. (break) ...recommended process, you can understand Bhagavān. This process of increasing our attachment about God, or Kṛṣṇa, is called bhakti-yoga. Mayy āsakta-manāḥ pārtha yogaṁ yuñjan mad-āśrayaḥ. Mad-āśrayaḥ: "taking shelter of Me or taking shelter of My devotee." Mad-āśrayaḥ. That yoga is called bhakti-yoga. Mad-āśrayaḥ means "taking shelter of Me" or "taking shelter of the person who has taken shelter of Me."
So in this way if we execute bhakti-yoga, then asaṁśayaṁ samagraṁ māṁ yathā jñāsyasi: (BG 7.1) you'll be able to understand God as He is without any doubt and in fullness. To understand Bhagavān fully means not only understand the Supreme Personality of Godhead but also understand what is Brahman, what is Paramātmā. In other words, if you understand Bhagavān, Kṛṣṇa, then you automatically understand what is Brahman, what is Paramātmā.