'If the intentions of the Christmas Conference are to be carried out, the Anthroposophical Society will in future have to fulfil, as far as possible, the esoteric aspirations of its members. With this end in view, the School, consisting of three Classes, will be established within the General Society.' - Rudolf Steiner, January 1924. A year after the burning of the first Goetheanum building in Dornach, Switzerland, Rudolf Steiner refounded the Anthroposophical Society during the Christmas Conference of 1923/24. At the heart of the Society he created 'the School of Spiritual Science', which has the specific task of presenting 'the esoteric aspect', and leading its members to knowledge and experience of the spirit. The School was to have 'Sections' to represent various fields of human endeavour, such as Medicine and Education, and three 'Classes', with the First Class to be established immediately by Rudolf Steiner. This short book is a collection of articles (from the Society Newsletter) and lectures by Rudolf Steiner from 1924, introducing and explaining the purpose of the School of Spiritual Science to members of the Anthroposophical Society. It forms a companion volume to The Foundation Stone / The Life, Nature and Cultivation of Anthroposophy.