What is the nature of matter? Within conventional science, the reductionist, materialist view asserts that matter is solely physical. Hauschka shows that open-minded study, based on qualitative observation and quantitative research, can overcome this now standardized view. Without denying the laws of matter, he shows the limitations of a science restricted by them, and points to new research that indicates the primal nature of spirit. This classic work, reprinted in its original form, is the result of Dr Hauschka's many years' research at the Ita Wegman Clinic in Arlesheim, Switzerland. Through decades of experimentation he came to radical conclusions that suggested potential new directions for science. This book includes the detailed results of Hauschka's experiments--although his approach is not restricted to measurement and outer observation. Based on the work of Goethe and Steiner, he encourages a method of seeing nature that has an artistic quality, and calls for direct experience rather than intellectual theorizing. The Nature of Substance is generally accessible. The author deliberately avoids technical terms and academic style in favor of vivid descriptions and lively discussions. His fascinating study takes in many substances, with chapters on plants, animals, oils, proteins, carbohydrates, vitamins, minerals, metals, carbon, oxygen, poisons, high dilutions, and much more. This book is a companion volume to the author's other work, Nutrition.