This paper addresses the question of whether, according to Plato, there are forms of sensible qualities; it is also addressed to the wider question of whether there are forms of physical and material things more generally. In particular, it considers the tension raised by the following theses: (1) a Platonic form is the essence of some thing; (2) for Plato, those essences that are forms are imperceptible and are knowable through reasoning alone; (3) knowing the essence of a particular color (...) (e.g., red) requires presentation with the relevant sensible quality and hence requires sense perception; (4) if a sensible quality has an essence, then that essence is a form. The solution I defend to this puzzle basically consists of accepting (1) through theses (3) but denying thesis (4). Sensible qualities, according to Plato, do have essences, but specifying their essences does not require that one postulate a separate form. (shrink)

This paper considers the place of the capacity for sense perception in Plato's tripartite soul. It argues, against a common recent interpretation, that despite being a capacity of the soul's appetitive part, sense perception is not independent of the soul's rational capacities. On the contrary, the soul's ability to recognize the content that it receives through sense perception depends upon the objects and the activity of its rational capacities. Defending a position of this sort requires one to suppose that despite (...) its partition, the soul, for Plato, is, with respect to the activities of its various parts, substantially unitary. There are however passages in Plato that suggest that the capacities of the non-rational soul parts, in general, and sense perception, in particular, enjoy a certain degree of autonomy and independence from reason such that they, without the input of reason, can form beliefs about, and act on the basis of, their content. These passages have been read as belying this supposition. In this paper, however, I argue that these passages are perfectly consistent with the idea that the content of the non-rational capacities of the soul depends, for its intelligibility, on the soul's rational capacities. (shrink)

This paper considers Berkeley’s use of Plato in Siris. Berkeley’s engagement with ancient thinkers in Siris has been a source of puzzlement for many readers. In this paper I focus on Siris § 266. In particular, I consider why Berkeley says of the Platonists that they “distinguished the primary qualities in bodies from the secondary” and why, given his own well-known misgivings about the distinction, he characterizes this as part of a “notion of the true system of the world.” I (...) argue that in Siris Berkeley accepts a distinctive form of corpuscularianism, and that he thinks a distinction between primary and secondary qualities follows from this. I further argue that in § 266, and elsewhere in Siris, Berkeley engages in a careful reading of Plato’s Timaeus, which he uses to bolster his defense of the compatibility between corpuscularianism and his immaterialist idealism. (shrink)