karau harer mandira-mārjanādiṣu
ghrāṇaṁ ca tat-pāda-saroja-saurabhe
śrīmat-tulasyā rasanāṁ tad-arpite
kāmaṁ ca dāsye na tu kāma-kāmyayā
In Bhagavad-gītā (7.1) the Lord recommends, mayy āsakta-manāḥ pārtha yogaṁ yuñjan mad-āśrayaḥ. This indicates that one must execute devotional service under the guidance of a devotee or directly under the guidance of the Supreme Personality of Godhead. It is not possible, however, to train oneself without guidance from the spiritual master. Therefore, according to the instructions of Śrīla Rūpa Gosvāmī, the first business of a devotee is to accept a bona fide spiritual master who can train him to engage his various senses in rendering transcendental service to the Lord. The Lord also says in Bhagavad-gītā (7.1), asaṁśayaṁ samagraṁ māṁ yathā jñāsyasi tac chṛṇu. In other words, if one wants to understand the Supreme Personality of Godhead in completeness, one must follow the prescriptions given by Kṛṣṇa by following in the footsteps of Mahārāja Ambarīṣa. It is said, hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate: bhakti means to engage the senses in the service of the master of the senses, Kṛṣṇa, who is called Hṛṣīkeśa or Acyuta. These words are used in these verses. Acyuta-sat-kathodaye, hṛṣīkeśa-padābhivandane. The words Acyuta and Hṛṣīkeśa are also used in Bhagavad-gītā. Bhagavad-gītā is kṛṣṇa-kathā spoken directly by Kṛṣṇa, and Śrīmad-Bhāgavatam is also kṛṣṇa-kathā because everything described in the Bhāgavatam is in relationship with Kṛṣṇa.