" Ideas are the centers of our gravitation, this very definite void which the vault of language is built around, and which has actual existence only in the weight and counterweight of stones. But are the visible things of the visible world constructed any differently? They are always behind what I see of them, as horizons, and what we call visiblity is
this very transcendence. No thing, no side of a thing, shows itself except by actively hiding the others, denouncing them in the act of concealing them. To see is as a matter of principle to see farther than one
sees, to reach a latent existence. The Invisible is the outline and the depth of the visible. The visible does not admit of pure positivity any more than the invisible does. "
― Maurice Merleau-Ponty , Signs