The title of this volume, published to accompany Arena's exhibition at Fondazione Nicola Del Roscio in Rome, refers to a famous quote by Heraclitus that was inscribed on the lintel of the entrance door of Heidegger's famous hütte in Todtnauberg, rebuilt in real dimensions inside the space of the Foundation. The hut, ideally related to the philosopher's memory, is a work that contains a series of new sculptures that create a game of continuous cross-references and exchanges between container and content, visible and invisible, individual and collective experience. By superimposing archive images and current documentation, this book replicates the same dynamics.