In this volume, Giulio Maspero explores both the ontology and the epistemology of the Cappadocians from historical and speculative points of view. He shows how the Cappadocians developed a real Trinitarian Ontology through their reshaping of the Aristotelian category of relation, which they rescued from the accidental dimension and inserted into the immanence of the one divine and eternal substance. This perspective made possible a new conception...