Importance of hearing in a Society of Twice Borns

SB 4.12.48

The great sage Maitreya recommended: One should chant of the character and activities of Dhruva Mahārāja both in the morning and in the evening, with great attention and care, in a society of brāhmaṇas or other twice-born persons.

From Srila Prabhupada's purport:

It is said that only in the association of devotees can one understand the importance of the character and pastimes of the Supreme Personality of Godhead or His devotees. In this verse it is especially recommended that Dhruva Mahārāja’s character be discussed in a society of the twice-born, which refers to the qualified brāhmaṇas, kṣatriyasand vaiśyas. One should especially seek the society of brāhmaṇas who are elevated to the position of Vaiṣṇavas. Thus discussion of Śrīmad-Bhāgavatam, which describes the character and pastimes of devotees and the Lord, is very quickly effective. The International Society for Krishna Consciousness has been organized for this purpose. In every center of this Society — not only in the morning, evening or noon, but practically twenty-four hours a day — there is continuous devotional service going on. Anyone who comes in contact with the Society automatically becomes a devotee. We have actual experience that many karmīs and others come to the Society and find a very pleasing and peaceful atmosphere in the temples of ISKCON. 

and 

Srila Prabhupada also explains this in the verse describing who can Back to Godhead in SB 4.12:

A devotee is equipoised. He sees everyone on the same transcendental platform. A devotee knows that although a conditioned soul has a particular type of body according to his past fruitive activities, factually everyone is part of the Supreme Lord. A devotee sees all living entities with spiritual vision and does not discriminate on the platform of the bodily concept of life. Such qualities develop only in the association of devotees. Without the association of devotees, one cannot advance in Kṛṣṇa consciousness. Therefore, we have established the International Society for Krishna Consciousness. Factually, whoever lives in this society automatically develops Kṛṣṇa consciousness. Devotees are dear to the Supreme Personality of Godhead, and the Supreme Personality of Godhead is only dear to devotees. On this platform only can one make progress in Kṛṣṇa consciousness. Persons in Kṛṣṇa consciousness, or devotees of the Lord, can please everyone, as is evident in the Kṛṣṇa consciousness movement.