What is the secret of hearing and chanting? A professional speaker cannot impress transcendental ecstasy within the heart of the listeners. However, when a realized soul who is engaged in the service of the Lord is speaking, he has the potency to inject spiritual life within the audience. One should, therefore, seek the association of such pure unalloyed devotees, and by such association and service a neophyte devotee will certainly develop attachment, love and devotion for the Supreme Personality of Godhead.

Srila Prabhupada; Nectar of Devotion Chapter 17