Easter Course III
If we want really to understand the being of man for the purposes of treatment, we must be absolutely clear about the fact that we cannot take into consideration only what binds the human being to the earth, for that is of importance only in the very first years of childhood, up to the time of the change of teeth, and then no longer. After the change of teeth we have to consider those forces which really organize the human being away from the earth. For this purpose he has his etheric body and the etheric body is essentially different from the physical body. The physical body is heavy, the etheric body is not. The physical body strives towards the earth, the etheric body away from the earth in all directions, in all directions of cosmic space. You include the universe when you study the physical body and the etheric body of man. The physical body is inwardly connected with the earth, the etheric body with everything that lies in the perceptible universe around the earth. So that you can think of all the forces which work upon the physical body as being forces which draw the human being to the earth, and all those forces which work upon the etheric body as forces which draw the human being away from the earth.