In diabetes mellitus the case is as follows: the ego-organization, as it submerges in the astral and etheric realm, is so weakened that it can no longer effectively accomplish its action upon the sugar-substance. The sugar then undergoes the processes in the astral and etheric realms which should take place in the ego-organization.... From all this we see that a real healing process for diabetes mellitus can only be initiated if we are in a position to strengthen the ego-organization of the patient.
Rudolf Steiner