I. Soul and Spirit in the Human Physical Constitution

How are the thoughts produced? Through the fact that within the fluid organism something asserts itself in a particular metamorphosis—namely, what we know in the external world as tone. Tone is, in reality, something that leads the ordinary mode of observation very much astray. As earthly human beings we perceive the tone as being borne to us by the air. But in point of fact the air is only the transmitter of the tone, which actually weaves in the air. And anyone who assumes that the tone in its essence is merely a matter of air-vibrations is like a person who says: Man has only his physical organism, and there is no soul in it. If the air-vibrations are thought to constitute the essence of the tone, whereas they are in truth merely its external expression, this is the same as seeing only the physical organism with no soul in it. The tone which lives in the air is essentially an etheric reality. And the tone we hear by way of the air arises through the fact that the air is permeated by the Tone Ether (see diagram III) which is the same as the Chemical Ether. In permeating the air, this Chemical Ether imparts what lives within it to the air, and we become aware of what we call the tone.