When you begin to hear about Kṛṣṇa, then the hearing of kṛṣṇa-kathā, the topics about Kṛṣṇa, is puṇya-śravaṇa-kīrtanaḥ. It is, even if you do not understand, it will increase your virtue. Puṇya-śravaṇa-kīrtanaḥ hṛdy antaḥ-stho hy abhadrāṇi. We have accumulated so much dust by our material contact. By so many years' association with the matter, we have accumulated so much dirty things within our heart. That becomes gradually cleansed. Śṛṇvatāṁ sva-kathāḥ kṛṣṇaḥ puṇya-śravaṇa-kīrtanaḥ, hṛdy antaḥ-stho hy abhadrāṇi. Hṛdy antaḥ-stho hy abhadrāṇi vidhunoti suhṛt satām.
Śrī Kṛṣṇa is friend of everyone, but He's a special friend to the devotee. That you will find in Bhagavad-gītā. Samo 'haṁ sarva-bhūteṣu na me dveṣyo 'sti na priyaḥ: (BG 9.29) "I am friend of everyone. Nobody is My enemy, and nobody is My friend. But I am equal to everyone." Sama, sama means equal. Ye tu bhajanti māṁ bhaktyā teṣu te mayi: "But a person who is devoted to Me and is engaged in devotional service with Me, I have got special attention for him."