QUOTE : An organ of the mobile senses (the eye, the hand) is already a language because it is an interrogation (movement) and a response (perception as fulfillment of a project), speaking and understanding. It is a tacit language...The difference is only relative between a perceptual silence and a language that always carries a thread of silence...Each sign, being a difference with respect to others, and each signification a difference with respect to others, means that the life of language reproduces perceptual structures at another level. We speak in order to fill in the blanks of perception, but words and meanings are not of the absolute positive...The invisible, mind, is not another positivity: it is the inverse, or the other side of the visible.