Lecture IV

When we call spiritual science to our aid, we distinguish four grades of substance—earth, water, air and warmth. We then enter the realm where we speak of warmth-ether, of light-ether. As far up as the light-ether we kill that which penetrates us; we slay it unceasingly in order that we may have our Earth-consciousness. But there is something we cannot kill by our Earth-existence. We know that above the light-ether there is the so-called chemical ether, and then there comes the life-ether. These are the two kinds of ether that we cannot kill. But because of this, they have no special participation in us. If we were able to kill the chemical ether, the waves of the Harmony of the Spheres would sound perpetually into our physical body, and we should perpetually destroy these waves with our physical life. And if we would also kill the life-ether, we should destroy and continuously kill within ourselves the cosmic life that streams down to the Earth. In earthly sound we are given a substitute, but it is not to be compared with what we should hear if the chemical ether were audible to us as physical human beings. For physical sound is a product of the air and is not the spiritual sound; it is only a substitute for the spiritual sound.