Time’s Causal Power: Proclus and the Natural Theology of Time by Antonio Luis Costa Vargas (review)

Reviewed by: Time's Causal Power: Proclus and the Natural Theology of Time by Antonio Luis Costa Vargas M. Martijn VARGAS, Antonio Luis Costa. Time's Causal Power: Proclus and the Natural Theology of Time. Boston: Brill, 2021. i + 231 pp. Cloth and eBook, 162. 00 The metaphysics of time in Neoplatonism tends to be described top-down: From transcendent eternity, time as we know it emanates. This is hardly informative about the nature of time as such, however. Vargas's monograph about Proclus's theory of time instead takes a bottom-up approach: From the effects of time, he ascends to transcendent and divine Time as their cause—a natural theology. In the process, we learn that the key element of Proclus's theory is that Time, which orders events and distributes "lifetimes, " provides us with the possibility of understanding the world as an ordered, intelligible whole. The book contains four chapters providing a genealogy of sorts by systematically laying out Proclus's inspiration from the philosophy of time in Plato, Aristotle, the Stoics, and Plotinus respectively. Chapter 1 starts from Plato's Timaeus and the distinction between the "order of time" and the "flow of time. " The order of time is the intelligible, transcendent substance that causes the "flow of time, " that is, time as change. From the Republic, Proclus harvests "true Number" as determining the former, and the motions of the heavenly bodies dispensing lifespans to all beings as determining the latter. End Page 732 Chapter 2 starts from Aristotle's criticism of Platonic time as motion: A motion belongs to a specific substance, but time should be omnipresent. Vargas shows how Aristotle's understanding of change, causality, and time helps Proclus shape the order of time as a cosmic intelligence that makes the world intelligible through the number by which its processes are measured. In this chapter, Vargas presents a beautiful and rich analysis of how Neoplatonists adopt elements from Aristotle's physics, psychology, and biology in order to build their Platonic notion of time as "number that counts" or productive number. In Neoplatonic terms: Aristotle's first intellect as first mover becomes the substantial Order of Time in Proclus, the transcendent monad, and his lower movers become the chain of emanated lower times as kinds of intelligence. In chapter 3, Stoic biology helps elaborate the understanding of time as the order within the cosmos, the world as a living being, and contributes the idea of one simultaneous present or "now" for everything. This cosmic life helps counter Aristotle's criticism: All motions belong to specific substances but are part of the life of the cosmos. Vargas here also brings in an interesting link to more recent discussions in physics concerning the nature of simultaneity: How do we know whether things occurring far away from each other are simultaneous? The cosmic "now" and the notion of sympathy, which Proclus finds in synchronous processes, provide a metaphysical framework for such simultaneity. In chapter 4, Plotinus's contribution to Proclus's theory is discussed: the flow of time as the life of the world soul, which underlies all life in the cosmos and ties it together. It consists in the presence in the soul of the effects, that is, the external activity, of the emanated internal activity of Intelligence. Intelligence, according to Plotinus, must be alive because it is fully active, and its emanation in the world soul leads to the soul's own external activity, that is, its uniform and discursive production of the world. This external activity is time in the strictest sense of the word. The main difference between Plotinus and Proclus is that for Proclus the flow of time is inferior to the eternal life of the world soul, belonging to its external activity, but for Plotinus it coincides with the world soul. Another interesting difference Vargas highlights is that, where Plotinus denied the possibility of time being a number of changes because of the eternity of the world soul's production, Proclus instead ascribed it countable infinity resulting from the everlasting repetitions of the Great Year. Vargas's analyses contain very rich and detailed discussions of metaphysical issues such as the Aristotelian difference. . .