Unless one is associated with devotees, his devotional service does not mature ; it does not become distinct from material activities. The Lord says, satāṁ prasaṅgān mama vīrya-saṁvido bhavanti hṛt-karṇa-rasāyanāḥ (SB 3.25.25). Only in the association of pure devotees can the words of Lord Kṛṣṇa be fully potent and relishable to the heart and ear .

(SB 4.9.11p)