All the mystics and prophets and great thinkers of the world in all periods of history, in expressing the history of creation, have given the first place to sound. And the scientist of today says the same thing. He will call it radium, atom, electron; and after going through all the different atoms of substance he gets into the substance he calls movement. Movement is vibration. It is only the effect of motion which we call sound. Motion speaks, and speech we call sound, because it is audible. When it is not audible, it is because there is not sufficient capacity. But the cause of sound is movement, and movement is always there; which means that the existence of the movement does not depend upon capacity.