Enneads VI.1: Of the Ten Aristotelian and Four Stoic Categories
Matter Cannot Be the Primary Principle
26What is most shocking in the Stoic doctrine, is that they assign the first rank to what is only a potentiality, matter, instead of placing actualization before potentiality. It is impossible for the potential to pass to actualization if the potential occupy the first rank among beings. Indeed, the potential could never improve itself; and it implies the necessary anteriority of actualization; in which case potentiality is no longer a principle. Or, if it be insisted that actualization and potentiality must be simultaneous, both principles will be found depending on chance. Besides, even if actualization be contemporaneous with potentiality, why should not the first rank be assigned to actualization? Why should this (matter) be an essence, rather than those (forms)? Whoever asserts that form is posterior bears the burden of proof; for matter does not beget form, and quality could not arise from what has no quality; nor actualization from what is potential; otherwise, actualization would have existed anteriorly, even in the system of the Stoics. According to them, even God is no longer simple: He is posterior to matter; for He is a body constituted by form and matter. Whence then does He derive His form? If the divinity exist without matter, He is incorporeal, by virtue of His being principle and reason, and the active principle would thus be incorporeal. If, even without having matter, the divinity be composite in essence, by virtue of His body, the Stoics will have to postulate some other kind of matter which may better suit the divinity.
MATTER IS NOT A BODY “WITHOUT QUALITY, BUT WITH MAGNITUDE” (A STOIC DEFINITION).
Besides, how could matter be the first Principle, if it be a body? If the body of which the Stoics speak be of another nature, then matter can be called a body only figuratively. If they say that the common property of the body is to have three dimensions, they are speaking of the mathematical body. If on the contrary they join impenetrability to the three dimensions, they are no more talking about something simple. Besides, impenetrability is a quality, or is derived from a quality; but what is the source of impenetrability? Whence comes tri-dimensional extension? Who endued matter with extension? Matter, indeed, is not contained in the idea of tri-dimensional extension any more than the latter is contained in the notion of matter. Consequently, since matter thus participates in size, it is no longer a “simple” matter.