Steiner's original contribution to human knowledge was based on his ability to conduct 'spiritual research', the investigation of metaphysical dimensions of existence. With his scientific and philosophical training, he brought a new systematic discipline to the field, allowing for conscious methods and comprehensive results. A natural seer from childhood, he cultivated his spiritual vision to a high degree, enabling him to speak with authority on previously veiled mysteries of life. The evolving human being; Cosmos as the source of life; Plants and the living earth; Farms and the realms of nature; Bringing the chemical elements to life; Soil and the world of spirit; Supporting and regulating life processes; Spirits of the elements; Nutrition and vitality; Responsibility for the future.