Throughout his long intellectual life, Leibniz penned his reflections on Christian theology, yet this wealth of material has never been systematically gathered or studied. This book addresses an important and central aspect of these neglected materials-Leibniz's writings on two mysteries central to Christian thought, the Trinity and the Incarnation. From Antognazza's study emerges a portrait of a thinker surprisingly receptive to traditional Christian theology and profoundly committed to defending the legitimacy of truths beyond the full grasp of human reason. This view of Leibniz differs strikingly from traditional perceptions of the philosopher as a "hard" rationalist and quasi-deist. Antognazza also sets Leibniz's writings in the context of the important theological controversies of his day.