In Negative Certainties, renowned philosopher Jean-Luc Marion challenges some of the most fundamental assumptions we have developed about knowledge: that it is categorical, predicative, and positive. Following Descartes, Kant, and Heidegger, he looks toward our finitude and the limits of our reason. He asks an astonishingly simple—but profoundly provocative—question in order to open up an entirely new way of thinking about knowledge: Isn’t our uncertainty, our finitude and rational limitations, one of the few things we can be certain about? Marion shows how the assumption of knowledge as positive demands a reductive epistemology that disregards immeasurable or disorderly phenomena. He shows that we have experiences every day that have no identifiable causes or predictable reasons, and that these constitute a very real knowledge—a knowledge of the limits of what can be known. Establishing this “negative certainty,” Marion applies it to four aporias, or issues of certain uncertainty: the definition of man; the nature of God; the unconditionality of the gift; and the unpredictability of events. Translated for the first time into English, Negative Certainties is an invigorating work of epistemological inquiry that will take a central place in Marion’s oeuvre.