II. Blood is a Very Special Fluid

We have now reached the point where the being of humans can be understood insofar as they are related to the animal kingdom. The substances, such as oxygen, nitrogen, hydrogen, sulphur, phosphorus, and so forth, out of which our physical body is composed, are to be found outside in inorganic nature. If the substances transformed by the ether body into living matter are to attain the capacity to create inner mirror images of external events, then the ether body must be permeated by the astral body. It is the astral body that gives rise to sensations and feelings, but at the animal level does so in a specific way.