Unless one follows the spiritual master's instructions concerning the regulative principles and chanting and hearing the holy name of the Lord, one cannot become a pure devotee

Expressions researched:
"unless one follows the spiritual master's instructions concerning the regulative principles and chanting and hearing the holy name of the Lord, one cannot become a pure devotee"

CC Madhya-lila

Unless one follows the spiritual master's instructions concerning the regulative principles and chanting and hearing the holy name of the Lord, one cannot become a pure devotee.

CC Madhya 19.157, Purport:

Even if one thinks that there are many pseudo devotees or nondevotees in the Kṛṣṇa Consciousness Society, still one should stick to the Society; if one thinks the Society's members are not pure devotees, one can keep direct company with the spiritual master, and if there is any doubt, one should consult the spiritual master. However, unless one follows the spiritual master's instructions concerning the regulative principles and chanting and hearing the holy name of the Lord, one cannot become a pure devotee. By one's mental concoctions, one falls down. By associating with nondevotees, one breaks the regulative principles and is thereby lost. In the Upadeśāmṛta of Śrīla Rūpa Gosvāmī, it is said:

atyāhāraḥ prayāsaś ca prajalpo niyamāgrahaḥ

jana-saṅgaś ca laulyaṁ ca ṣaḍbhir bhaktir vinaśyati

(NOI 2)

“One's devotional service is spoiled when he becomes too entangled in the following six activities: (1) eating more than necessary or collecting more funds than required, (2) overendeavoring for mundane things that are very difficult to attain, (3) talking unnecessarily about mundane subject matters, (4) practicing the scriptural rules and regulations only for the sake of following them and not for the sake of spiritual advancement, or rejecting the rules and regulations of the scriptures and working independently or whimsically, (5) associating with worldly-minded persons who are not interested in Kṛṣṇa consciousness, and (6) being greedy for mundane achievements.”