First published in 1912, this volume constitutes an exploration of the complications surrounding the idea of evil in the works of Plotinus (204–270 BC), the ancient Greek philosopher widely regarded as the founder of Neoplatonism. The key issue explored by the text is the reconciliation of an omnipotent deity with the existence of an apparently contingent and imperfect world. In basic terms, the problem is one of irreconcilability between permanence and change; the singularity of God and the multiplicity of the world. This highly readable book will be of value to anyone with an interest in Plotinus, ancient philosophy, or theology.