“What I call depth is either nothing,or else it is my participation in a Being without restriction,first and foremost a participation in the being of space beyond every particular point of view.Things encroach upon one another because they are outside one another.The proof of this is that i can see depth in a painting which everyone agrees has none and which organizes for me an illusion of an illusion…. This two-dimensional being, which makes me see a third, is a being that is pierced – as the men of the Renaissance said, a window… But in the final analysis the window opens only upon partes extra partes, upon height and breadth merely seen from another angle – upon the absoulute positivity of Being.”

– M. Merleau-Ponty