Abstract

This chapter shows even tighter textual and conceptual connections between these philosophers, delineating how Spinoza drew from Avicenna on the definition of essence and the essence/existence distinction. Spinoza departs from Avicenna, potentially regarding the tendency of essences for existence and especially regarding their universality and particularity. Multiple doses of Avicennianism likely made their way into Spinoza's bloodstream. Avicenna's Najāt and the IP are the most likely sources for Maimonides's own knowledge of Avicenna. In medieval philosophy, including Avicenna accidents are real beings and are isomorphic to Spinoza's modes. As may already be clear and is well‐attested, Avicenna and Spinoza agree that the essence/existence distinction only holds for things other than God. Spinoza's apparent insistence on essence as particular in itself seems to a more fundamental contrast with Avicenna and a more obviously modern/late medieval innovation than Spinoza's utilization of God's nominal essence in an ontological proof.