The sensory experience has only a narrow margin at its disposal: either the sound and the colour, through their own arrangement, throw an object into relief, such as an ashtray or a violin, and this object speaks directly to all the senses; or else, at the opposite end of experience, the sound and the colour are received into my body, and it becomes difficult to limit my experience to a single sensory department: it spontaneously overﬂows towards all the rest.