Hand with Reflecting Sphere, lithograph, 1935.
“A reflective sphere rests on the hand of the draftsman. He sees a much more complete picture of his surroundings in that mirror than through direct observation, because he sees almost the entire space around him: four walls, floor and ceiling of his room are , albeit distorted, compressed into that disk. His head, more precisely: the point right between his eyes, is in the center. No matter how he turns, he remains the center .” ~ M.C. Escher, Grafiek en Tekeningen.