This paper investigates Nietzsche’s reception of Spinoza in order to develop our understanding of the complex relations between their respective philosophies starting from their shared commitment to ontologies of power. The first three sections of this essay contain a diachronic analysis of Nietzsche’s engagement with Spinoza and a discussion of the major themes in play. The last section consists in an evaluation of Nietzsche’s explicit and implicit criticisms that helps us gain a sense of the coherence running through them, as (...) well of the core similarities and differences between two philosophies steeped in immanence and naturalism. Even if Nietzsche’s criticisms do not always do justice to Spinoza’s thinking, they nevertheless offer invaluable clues to guide our comparative project. (shrink)