Abstract

Aristotle construed metaphysics primarily in terms of ontology, whereas Plato had developed a different approach to the philosophy of principles. The main task of the metaphysical theory of principles is the quest for the absolute. For Plato, however, the absolute is the one; and this idea - most influentially advocated by Plotinus - is the foundation of a tradition that construes metaphysics mainly in terms of henology. The central aspects of this doctrine are the idea of the transcendence of the absolute one, the perspective of negative theology, and - in Plotinus - a genuinely philosophical kind of mysticism.