So these are the philosophical development. So Kṛṣṇa is summarizing this philosophical development here in this one line, that mama vartmānuvartante manuṣyāḥ pārtha sarvaśaḥ. Either you follow Buddha philosophy or Śaṅkara philosophy or Vaiṣṇava philosophy, the ultimate goal is Kṛṣṇa. Mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya (BG 7.7). So you have to approach Kṛṣṇa through these different types of philosophy. They are partial realization. Just like Brahman realization means eternity realization, Paramātmā realization means eternity and knowledge, and Bhagavān realization means eternity, knowledge and blissfulness. Sac-cid-ānanda. Īśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda-vigrahaḥ (Bs. 5.1). If you realize Kṛṣṇa, then you realize simultaneously . . . yasmin vijñāte sarvam idaṁ vijñātaṁ bhavati. You realize Brahman, you realize Paramātmā and you realize Bhagavān. That is our duty.
Therefore Kṛṣṇa says, bahūnāṁ janmanām ante jñānavān māṁ prapadyate (BG 7.19). Because ultimately Kṛṣṇa. Ahaṁ sarvasya prabhavo mattaḥ sarvaṁ pravartate, ahaṁ sarvasya . . . (BG 10.8). And Kṛṣṇa says . . . Vedānta says also, janmādy asya yataḥ (SB 1.1.1). Brahman, Paramātmā, they are expansion of Kṛṣṇa. Kṛṣṇa is the original. Mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya (BG 7.7). This is the truth.