I. Soul and Spirit in the Human Physical Constitution

The warmth organism is paramountly the field of the Ego. The Ego itself is that spirit-organization which imbues with its own forces the warmth that is within us, and governs and gives it configuration, not only externally but also inwardly. We cannot understand the life and activity of the soul unless we remember that the Ego works directly upon the warmth. It is primarily the Ego in man which activates the will, generates impulses of will.—How does the Ego generate impulses of will? From a different point of view we have spoken of how impulses of will are connected with the earthly sphere, in contrast to the impulses of thought and ideation which are connected with forces outside and beyond the earthly sphere. But how does the Ego, which holds together the impulses of will, send these impulses into the organism? This is achieved through the fact that the will works primarily in the warmth organism. An impulse of will proceeding from the Ego works upon the warmth organism. Under present earthly conditions it is not possible for what I shall now describe to you to be there as a concrete reality. Nevertheless it can be envisaged if we disregard the physical organization within the space bounded by the human skin, if we disregard also the fluid organism, and the airy organism. The space then remains filled with nothing but warmth which is, of course, in communication with the warmth outside. But what is active in this warmth, what stirs it into movement, makes it into an organism—is the Ego.