The following injunction is given in the Hari-bhakti-vilāsa regarding mantra-adhikārī, the qualification for receiving mantra initiation: "Śūdras and women who are chaste and sincerely interested in understanding the Absolute Truth are qualified to be initiated with the pāñcarātrika-mantras."
“You should discuss the qualifications necessary for receiving a mantra, the perfection of the mantra, the purification of the mantra, initiation, morning duties, remembrance of the Supreme Lord, cleanliness and washing the mouth and other parts of the body.
The following injunction is given in the Hari-bhakti-vilāsa (1.194) regarding mantra-adhikārī, the qualification for receiving mantra initiation:
- tāntrikeṣu ca mantreṣu dīkṣāyāṁ yoṣitām api
- sādhvīnām adhikāro ‘sti śūdrādīnāṁ ca sad-dhiyām
"Śūdras and women who are chaste and sincerely interested in understanding the Absolute Truth are qualified to be initiated with the pāñcarātrika-mantras." This is confirmed by Lord Kṛṣṇa in the Bhagavad-gītā (9.32):
- māṁ hi pārtha vyapāśritya ye ‘pi syuḥ pāpa-yonayaḥ
- striyo vaiśyās tathā śūdrās te ‘pi yānti parāṁ gatiṁ
"O son of Pṛthā, those who take shelter in Me, though they be of lower birth—women, vaiśyas (merchants) and śūdras (workers)—can attain the supreme destination."
If one actually wants to serve Kṛṣṇa, it doesn't matter whether one is a śūdra, vaiśya or even a woman. If one is sincerely eager to chant the Hare Kṛṣṇa mantra or dīkṣā-mantra, one is qualified to be initiated according to the pāñcarātrika process. However, according to Vedic principles, only a brāhmaṇa who is fully engaged in his occupational duties can be initiated. Śūdras and women are not admitted to a vaidika initiation. Unless one is fit according to the estimation of the spiritual master, one cannot accept a mantra from the pāñcarātrika-vidhi or the vaidika-vidhi. When one is fit to accept the mantra, one is initiated by the pāñcarātrika-vidhi or the vaidika-vidhi. In any case, the result is the same.
Regarding mantra-siddhy-ādi-śodhana, the efficacy of the mantra, Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura gives sixteen divisions, which are confirmed in the Hari-bhakti-vilāsa (beginning with 1.204):
- siddha-sādhya-susiddhāri-
- kramāj jñeyo vicakṣaṇaiḥ
These are (1) siddha, (2) sādhya, (3) susiddha and (4) ari. These four principles can be divided further: (1) siddha-siddha, (2) siddha-sādhya, (3) siddha-susiddha, (4) siddha-ari, (5) sādhya-siddha, (6) sādhya-sādhya, (7) sādhya-susiddha, (8) sādhya-ari, (9) susiddha-siddha, (10) susiddha-sādhya, (11) susiddha-susiddha, (12) susiddha-ari, (13) ari-siddha, (14) ari-sādhya, (15) ari-susiddha, and (16) ari-ari.
Those who are initiated with the eighteen-syllable mantra do not need to consider the above-mentioned sixteen divisions. As enjoined in the Hari-bhakti-vilāsa (1.215, 219, 220):
- na cātra śātravā doṣā narṇasvādi-vicāraṇā
- ṛkṣa-rāśi-vicāro vā na kartavyo manau priye
- nātra cintyo ‘ri-śuddhyādir nāri-mitrādi-lakṣaṇam
- siddha-sādhya-susiddhāri-rūpā nātra vicāraṇā
There is śodhana, or purification of the mantra, but there is no such consideration for the Kṛṣṇa mantra. Balitvāt kṛṣṇa-mantrāṇāṁ saṁskārāpekṣaṇaṁ na hi: "The Kṛṣṇa mantra is so strong that there is no question of śodhana." (Hari-bhakti-vilāsa 1.235)