THE SOUND Krsna and the original Krsna are the same. When we chant Hare Krsna and dance, Krsna is also dancing with us. Of course we may say, "Well, I do not see Him," but why do we put so much stress on seeing? Why not hearing? Seeing, tasting, smelling, touching, and hearing are all instruments for experience and knowledge. Why do we put such exclusive stress on seeing? A devotee does not wish to see Krsna; he is satisfied by simply hearing of Krsna. Seeing may eventually be there, but hearing should not be considered any less important. There are things which we hear but do not see the wind may be whistling past our ears, and we can hear it, but there is no possibility of seeing the wind. Since hearing is no less an important experience or valid one than seeing, we can hear Krsna and realize His presence through sound. Sri Krsna Himself says, "I am not there in My abode, or in the heart of the meditating yogi, but where My pure devotees are singing." We can feel the presence of Krsna as we actually make progress.
– Srila Prabhupada