Baruch de Spinoza (1632-1677) is most often treated as a secular philosopher in the literature. But the critical-historical and textual analyses explored in this study suggest that Spinoza wrote the Ethics not as a secular project intended to supersede monotheism for those stoic enough to plumb its icy depths, but rather, and as is much less often assumed, as a genuinely Judeo-Christian theological discourse accounting for the changing scientific worldviews and political realities of his time. This paper draws upon scholarship documenting Spinoza's involvement with Christian sects such as the Collegiants and Quakers. After establishing the largely unappreciated importance of Spinoza's religious or theological thought, a close reading of the Ethics demonstrates that friendship is the theme that ties together Spinoza's ethical, theological, political, and scientific doctrines.