SB 1.6 - The transcendental sound vibration

Then the Lord, personified by sound and unseen by eyes, stopped speaking. That the Lord was not seen but only heard does not make any difference. He produced the four Vedas by His breathing, and He is seen and realized thru the sound of the Vedas. Similarly, the Bhagavad gītā is the sound representation of the Lord, and there is no difference in identity. The Lord can be seen and heard by persistent chanting of the transcendental sound.

Nārada bowed his head and offered obeisances to Him. Then Nārada began chanting the holy name and fame of the Lord ignoring all formalities of the material world. Such chanting and remembering of the transcendental pastimes of the Lord are benedictory. Nārada simply awaited the time when the Lord would award him mercy by making him an associate. A devotee, after initiation takes very seriously chanting the glories of the Lord and traveling all over the world so that others may also hear the glories of the Lord. Such devotees are never envious of anyone, nor are they proud of being eligible to go back to Godhead. They chant and remember about the Lord, and according to personal capacity distribute the message for others’ welfare without motive of material gain.