Therefore guru must be authorized person, not that bhūmi-phala-guru(?). No. “I am guru,” no. You cannot become guru unless you are agent to draw out the mercy water from the ocean of mercy of Kṛṣṇa. That is guru. And therefore a guru is not an ordinary person. He is the representative, bona fide representative of Kṛṣṇa. Bhaktivinoda Ṭhākura has sung, kṛṣṇa se tomāra, kṛṣṇa dite pāra: “Vaiṣṇava Ṭhākura, Kṛṣṇa is your property. If you like, you can give.” Vedeṣu durlabhaṁ adurlabhaṁ ātma-bhaktau [Bs. 5.33]. You cannot get Kṛṣṇa by studying Vedas. That is not possible. There is Kṛṣṇa in the Vedas, but you cannot pick up. It is not possible. But if you go to the Kṛṣṇa’s favorite person… Kintu prabhor yaḥ priya eva tasya. Kṛṣṇa’s very dear servant, confidential servant, is guru. Nobody can become guru unless he is in confidence of Kṛṣṇa.
Link to this page: https://prabhupadabooks.com/classes/sb/5/6/8/vrndavana/november/30/1976
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Prabhupāda: Kṛṣṇa-prāpti hoy yāhā haite. That is spiritual master, one who can give you Kṛṣṇa. Kṛṣṇa se tomāre, kṛṣṇa dite pāra, dhāi tava pāche pāche-Bhaktivinoda Ṭhākura. “Kṛṣṇa… I am seeking after Kṛṣṇa, Vaiṣṇava Ṭhākura, my spiritual master. So Kṛṣṇa is your property.” Kṛṣṇa is not independent. He is the property of the devotee. Kṛṣṇa se tomāra, kṛṣṇa dite pāra, dhāi tava pāche pāche: “I am just following you, sir. Because Kṛṣṇa is your property, if you like, you can deliver: ‘Take it immediately.’ ” So it is not flattering; it is in the śāstras. Vedeṣu durlabha adurlabha ātmā-bhaktau. You cannot get Kṛṣṇa by studying all the Vedas.Vedeṣu durlabha. Durlabha means it is not possible. Athāpi te deva padāmbuja-dvaya-prasāda-leśānugṛhīta eva hi, jānāti tattvam [SB 10.14.29]. Prasāda-leśa. Prasāda-leśa. One who has got little favor of Kṛṣṇa, he knows Kṛṣṇa-tattva. Yat-kāruṇya-kaṭākṣa-vaibhavavatāṁ gauram eva stumaḥ.Link to this page: prabhupadabooks.com/classes/cc/madhya/20/105/new_york/july/11/1976
As indicated here by the word manastaḥ, the Supreme Personality of Godhead was transferred from the core of Vasudeva’s mind or heart to the core of the heart of Devakī. We should note carefully that the Lord was transferred to Devakī not by the ordinary way for a human being, but by dīkṣā, initiation. Thus the importance of initiation is mentioned here. Unless one is initiated by the right person, who always carries within his heart the Supreme Personality of Godhead, one cannot acquire the power to carry the Supreme Godhead within the core of one’s own heart.
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Madhya 15.108 purport…According to the Vaiṣṇava regulative principles, one must be initiated as a brāhmaṇa. The Hari-bhakti-vilāsa (2.6) quotes the following injunction from the Viṣṇu-yāmala:adīkṣitasya vāmorukṛtaṁ sarvaṁ nirarthakampaśu-yonim avāpnotidīkṣā-virahito janaḥ“Unless one is initiated by a bona fide spiritual master, all his devotional activities are useless. A person who is not properly initiated can descend again into the animal species.”
Phalgun Krsna PancamiThird Vasistya21. If everyone simply sat down together and considered these things what nice preaching there could be.22. What is your order also, that everyone, coming together, should merge in your message and preach it to the world.23. If everyone just initiates then there will only be a contradictory result. As long as it goes on, there will be only failure.24. Now even, my God brothers, you return here to the order of our master, and together we engage in his puja.25. But simply a festival of flowers and fruits does not constitute worship. The one who serves the message of the guru really worships him.