Abstract

This paper analyses the central function that the Forms of Likeness and Unlikeness perform in the metaphysics of Proclus. Mainly drawing from Proclus’ Commentary on the Parmenides, the focus will be on the double role of these Forms as causes of the relations of likeness between different sensible particulars on the one hand and of the relations between sensible particulars and the Forms in which they partake on the other. It will be argued that the relations of likeness between sensible particulars, while not identical to the corresponding relations between particulars and Forms, can nonetheless be related to the causal operation of the same Forms. One can therefore conclude that Proclus’ account of the causality of Likeness and Unlikeness – despite its complexity, which is partly due to the combination of exegetic and more systematic considerations – is consistent.