Abstract
The goal of this essay is twofold. First, I will explicate the dynamic nature of Spinoza’s doctrine of virtue by discerning his reasons for defining virtuousness in terms of active power. Second, by taking this understanding of virtue as the point of departure, I will suggest a sense in which we can be said to be more or less eternal to the extent that we are virtuous and active. Spinoza’s specific brand of essentialism underpins both his doctrine of virtue and that of eternity, and reaching these goals requires discussing the two kinds of essences which hold a prominent place in the Ethics: the formal and the actual essences. This, in turn, allows us to throw some new light on the relationship between eternal and durational existence, the distinction between which forms the very backbone of Spinoza’s system.