26. The Secret of the Human Temperaments
Now the question arises: when is a person primarily a melancholic, a phlegmatic, a sanguine, a choleric? It has already been said in the introduction that all aspects of human nature interact with each other. Thus, all higher aspects of human nature interact with the physical body. If the human being had no ego, no individually constituted ego, then his blood and the whole blood circulation would not be as they are. The blood circulation is the expression of the ego. The ego is purely spiritual, but the effect of this spiritual, this ego, is the blood in its whole circulation. How the blood circulates in us is the expression of our ego. The expression of the astral body is the nervous system – at least one expression. The expression of the etheric body is the glandular system. Only that entity can have a glandular system that is permeated by an etheric body; for the etheric body permeates the physical body with the glandular system, which is necessary for all life, for nourishment and reproduction. Only a being that has an astral body can think and feel, because an astral body permeates the physical body with a nervous system. And only a being that is an ego can have a blood circulation, because that is the physical expression of the ego. Thus, every limb that we count among the higher limbs has an effect on the physical body. But conversely, the physical body has an effect back again.