Abstract

Responding to Henry Oldenburg’s request to clarify his views about the relation between God and Nature (Ep. 71), Spinoza writes: “I favor an opinion concerning God and Nature far different from the one Modern Christians usually defend. For I maintain that God is, as they say, the immanent, but not the transitive, cause of all things” (Ep. 73 (IV/307)). In the Ethics, Spinoza does not define the notion of causa immanens, but we can easily retrieve the precise meaning of the term by scrutinizing E1p18d in which Spinoza proves that “God is the immanent, not the transitive, cause of all things [Deus est omnium rerum causa immanens; non vero transiens].” The proof relies on two claims Spinoza established earlier in the Ethics: that all things are “in” God (E1p15), and that God is the “efficient cause” of all things (E1p16c1). Thus, an immanent cause is an efficient cause whose effect is in the cause, while a causa transiens is an efficient cause whose effect is not in the cause. (In the secondary literature, the relation of being-in is commonly referred to as ‘inherence’; notably, Spinoza himself uses the terminology of ‘inherence’ only once (Ep. 12 (IV/61)).)