The śravaṇa-kīrtana is the beginning of Kṛṣṇa conscious life. One who is very fortunate, he's in meeting, he meets somebody who is a pure devotee and accepts him as his spiritual master. Therefore here it is stated, mayy āsakta-manāḥ pārtha yogaṁ yuñjan mad-āśrayaḥ. One has to take shelter of a bona fide spiritual master... A spiritual master is always bona fide. And if he cultivates this Kṛṣṇa consciousness under the direction of a spiritual master, āśraye lañā bhaje, kṛṣṇa tāre nāhi tyaje.(?) Kṛṣṇa does not reject him. Kṛṣṇa accepts him. Śrīla Viśvanātha Cakravartī Ṭhākura says, yasya prasādād bhagavat-prasādo yasyāprasādān na gatiḥ kuto 'pi **. That, Viśvanātha Cakravartī Ṭhākura says, that "If you can please your spiritual master, then Kṛṣṇa is automatically pleased. And if you cannot please your spiritual master, then there is no way to understand Kṛṣṇa."
So therefore Kṛṣṇa says particularly here, mayy āsakta-manāḥ pārtha yogaṁ yuñjan... We have to execute the Kṛṣṇa consciousness yoga system under the guidance of a bona fide spiritual master. Mad-āśrayaḥ. Then asaṁśaya, without any doubt. Samagram, in fullness. In fullness means brahmeti paramātmeti bhagavān iti (SB 1.2.11). Kṛṣṇa is sac-cid-ānanda-vigraha (Bs. 5.1). Brahman is sad-aṁśa, the part which is eternal, and Paramātmā is cid-aṁśa, and Bhagavān is ānanda-aṁśa. And Bhagavān is full, sac-cid-ānanda. And we are all seeking after ānanda. Ānandamayo 'bhyāsāt (Vedānta-sūtra 1.1.12). The Vedānta says that a living entity, or Kṛṣṇa... Any living entity... Kṛṣṇa is also the supreme living entity, and we are small living entities. So every one of us are seeking after ānanda, transcendental bliss. So when we join together, the living entities and the Supreme Lord, that becomes ānanda, rāsa-līlā. That is wanted. That we are seeking. But we are seeking in a different way, in the material world. That is not possible. Kṛṣṇa therefore says, mayy āsakta-manāḥ pārtha yogaṁ yuñjan mad-āśrayaḥ. Śrī Rūpa Gosvāmī also, in Bhakti-rasāmṛta-sindhu, he says, ādau gurvāśrayam. "If one is interested in Kṛṣṇa consciousness, or God consciousness, he must approach a spiritual master." Kṛṣṇa also says, mad-āśrayaḥ. Tad viddhi praṇipātena paripraśnena sevayā (BG 4.34). These are all Vedic injunctions. Tad-vijñānārthaṁ sa gurum evābhigacchet (MU 1.2.12).