This chapter considers eternity, duration, time, and their interrelations, and aims to resolve a paradox in Spinoza's theory of the mind's eternity. Spinoza's metaphysics of time includes an endless series of virtuous regresses. Spinoza characterizes duratio as a “magnitude. Spinoza says that duratio is “conceived as being greater or lesser, and as composed of parts”. Spinoza addresses time and its relation to duratio in the Metaphysical Thoughts. Spinoza accepts Suarez's view that “duratio and existence are only rationally distinct”. Spinoza holds, (...) with some of the Scholastic philosophers, that extrinsic denominations are mind‐made. Spinoza also uses geometrical construction as a model for thinking about the relationship between eternity and time. Spinoza seems, prima facie, to think that the mind cannot ever be eternal, but also can become eternal, and moreover already is eternal. (shrink)