Coming to the mystical point of view, the first aspect that makes Intelligence conscious of the manifestation is sound. The next aspect is light or color. All the mystics and prophets and great thinkers of the world, when expressing the history of creation, have in all periods of history given the first place to sound. The scientist of today says the same thing. He calls it radiance, atom, electron, and after going through all the different atoms of substance he arrives at a substance that he calls movement. Movement is vibration. It is only the effect of motion which we call sound. Motion speaks, and we call speech sound because it is audible. When it is not audible, this is because there is no sufficient capacity to make it audible. But the cause of sound is movement, and movement is always there. This means that the existence of movement does not depend upon capacity.