Rhetoric and Philosophical Speech in Plotinus

Plotinus’ Enneads display a strategy of persuasion that can be called a philosophical rhetoric in more than just a general sense. It takes its lead from Plato’s definition of rhetoric as psychagogy and is, at least to some extent, theorized in Ennead V 3.6. Plotinus starts from the fact that logical necessity does not always entail inner assent, which he explains with the fallen state of the embodied soul – the addressee of all philosophical speech – and the influence of the senses. To heal the discrepancy of necessity and persuasion, which on the level of pure Intellect does not exist, philosophy must persuade the soul to ascend to the Intelligible, where it has its true roots. To achieve this goal, Plotinus combines two modes of philosophical speech: the ‘necessity mode’, which considers intelligible Being in itself and from its proper principles, and the ‘persuasive mode’, which teaches soul to view itself as a part and offspring of the intelligible world. Some examples, mainly from Ennead V.3, show how this combination works in practice and how it can be transferred to the Neoplatonic One, which, being ineffable, is strictly speaking unaccessible to speech and rhetoric.