Abstract

In On my own opinions, Galen claims to agree with Aristotle that the soul is the form of the body. But should we take this statement at face value? After all, Galen says that the substance of the soul is a bodily mixture, and that the soul is the form of the body in the sense that it is the principle of mixing of the elementary qualities (i.e., hot, cold, wet, and dry). As is well known, Aristotle explicitly rejects this sort of materialist account of the soul. In De Anima, he tells us that the soul cannot be a harmonia of bodily elements, understood either as the proportion according to which the elements are mixed, or as the mixtures themselves (I.4, 407b32-408a2). In this chapter, I argue that Galen rejects a substantive version of hylomorphism, in favor of a view according to which the soul’s substance is nothing other than a bodily mixture. Galen’s position contains a veiled objection to some central Aristotelian views and reveals a general suspicion regarding the Aristotelian notion of form as a genuine metaphysical and explanatory category.