In the architecture of Rudolf Steiners great cosmological temple this extraordinary course of lectures on spiritual beings forms the central pillar with other important texts such as the fourth chapter of An Outline of Esoteric Science The Spiritual Hierarchies and the Physical World and Inner Experiences of Evolution. These works outlining a revolutionary angelological cosmology lie at the heart of Steiners mission to transform our understanding of the world by laying down a new nondual phenomenological path to a contemporary divinespiritualphysical cosmology that is angelological and theophanic. For Steiner what constitutes the world are ampampquotbeingsampampquotincluding the ground of the world itself the ampampquotFather being.ampampquot Steiners cosmology or angelology is personal and it is known in relationship therefore he presents it in terms of states and deeds of conscious and of the divinespiritual beings whose states and deeds they are.