Following the death of the Austrian philosopher and spiritual scientist Rudolf Steiner in 1925, Ita Wegman - one of his closest esoteric pupils - began to publish regular letters to the members of the Anthroposophical Society.In Steiner's tradition, these letters were appended with 'leading thoughts' (or guiding principles).Esoteric Studies collects many of these 'letters to friends', together with various articles, reports and addresses by Ita Wegman on subjects such as the Christmas Foundation Conference, the Goetheanum building and the festival of Michaelmas.Featuring an informative foreword by Crispian Villeneuve and a commemorative study by George Adams, this book provides a fine introduction to the work of Ita Wegman, as well as a rousing call for courage and wakefulness in the spirit of the Archangel Michael!