3. Karma in Relation to Disease and Health

To put it clearly: In the lower animals or the plants, that which is outside does not react on the etheric body but leaves it untouched, carrying on an independent existence. When we come to the higher animals, reactions of the physical body are imposed upon the etheric body which adapts itself completely to the physical body; so that if we injure the physical body, we injure the etheric body at the same time. Hence the etheric body has to exercise greater powers if it has first to heal itself and then the corresponding member in the physical body. Therefore in the case of the etheric body of a higher animal, deeper healing forces must be called forth. But what is the connection? Why is the etheric body of a higher animal so dependant upon the forms of the physical body?