Abstract

In his commentary on Plato's Parmenides, Proclus critiques an unnamed predecessor for attributing self-constitution to the One, claiming that the notion necessitates duality in its subject. Proclus almost certainly has in mind Plotinus in Ennead VI.8.13-22, where the latter attributes self-causation and determination to the One. However in the latter context, Plotinus is rather attempting to show how the One's unity entails that it is the cause of such self-determinative activity manifested in Intellect (as in the earlier Enn. VI.8.1-7). One could conclude, as does John Dillon, that Proclus is giving up an unfair criticism of Plotinus. In this dissertation I offer some support for Proclus' critical stance with an analysis of both figures' positions, starting with a look at (1) self-constitution and its conceptual origin in self-motion; (2) Plotinus on the One's causality; (3) Proclus on the One's causality; and (4) an analysis of Enn. VI.8.13-14 in light of Proclus' critique. While it could be that Proclus takes little account for Plotinus' careful construction in the language of Enn. VI.8.13-22, still Proclus' critique hinges on a different view of causation for the One than Plotinus'. The different stance lies in the background for why Plotinus allows for self-constitution in the One, even if with metaphorical language, while for Proclus such language pertains only to the intermediate level below the One (with e.g. Being, between the One and Intellect) and not up to the One-itself.