Now what is the voice? Where does it originate? When one hears sound coming out of his mouth, it must be existing somewhere. In truth, sound pervades the universe. God is sound, light – everything. There is a point from where sound issues forth, and from that Creation point, or Om point, evolution starts. Sound has been given a door – our mouth – to manifest from. When a sound comes out of the mouth it is lost in the Universal Sound which is everywhere.
So what wonder is there if the sound produced by singing the megha tune reaches the clouds two miles above the earth and produces rain, when it is a recognized fact that sound waves are sent through telegraphy thousands of miles away. There is nothing spiritual or supernatural in producing rain through sound waves.
It is for this reason, because sound travels and creates various vibrations, that a person should read the holy books whether he understands their meaning or not. The words in the Zoroastrians' Zend Avesta, or in the Hindus' Gita, or in the Muslims' Koran, and in other scriptures, are so arranged that when they are pronounced the sound created comes very nearly in unison with the Universal Voice, or the Universal Sound, and is a great help in influencing a person spiritually.