"The vibration of Krsna's flute is always prominent in the ears of the gopis. Naturally they cannot hear anything else. Constant remembrance of the holy sound of Krsna's flute keeps them enlightened and enlivened, and they do not allow any other sound to enter their ears. Since their attention is fixed on Krsna's flute, they cannot divert their minds to any other subject. In other words, a devotee who has heard the sound of Krsna's flute forgets to talk or hear of any other subject. This vibration of Krsna's flute is represented by the Hare Krsna maha-mantra. A serious devotee of the Lord who chants and hears this transcendental vibration becomes so accustomed to it that he cannot divert his attention to any subject matter not related to Krsna's blissful characteristics and paraphernalia."
(Caitanya-caritamrta, Madhya-lila 21.144, Purport)
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