This book explores an idea of music, exemplified by the work of Debussy, in dialogue with a parallel movement in French literary and philosophical thought. Its central thesis is that modern music and philosophy converge on the same set of problems but from opposite directions. Through close readings of selected musical works it argues that Debussy’s rethinking of the relation between sound and grammar anticipates and complements the defining problem of modern philosophy – the gap between language and a sensory relation to the world, between abstract systems of signification and embodied experience. Although its principal focus is the music of Debussy, it ranges widely across French music from Fauré and Ravel to Dutilleux, Boulez, Grisey, Murail, and Saariaho. It ranges similarly through a set of French writers and philosophers, from Mallarmé and Proust to Merleau-Ponty, Jankélévitch, Derrida, Lyotard, and Nancy. Frequent reference is made to the visual arts (Rodin, Monet, Bonnard, Cezanne, Matisse). It explores the idea that this current of French music, running through the long twentieth century from Debussy to the present, makes sense in a manner that affords a different way of knowing the world, foregrounding sound over syntax, and sense over signification.