Extending Practical Medicine:: Fundamental Principles Based on the Science of the Spirit 5 Rev ed 5 edIn this classic introductory work on spiritual medicine, Rudolf Steiner worked in a unique literary collaboration with the physician Ita Wegman. Their aim was to revitalize the art of healing through spiritual knowledgeyet in so doing they did not underrate or dismiss modern allopathic medicine; rather, they illumined ordinary medicine beyond its materialistic outlook to a fuller realization of the human condition. As Ita Wegman wrote in her preface: