A little twitch in our optic nerve, a shock effect: twenty-four illuminated frames a second, darkness in between, the optic nerve incapable of registering darkness. At the editing table, when I run the strip of film through, frame by frame, I still feel that dizzy sense of magic of my childhood: in the darkness of the wardrobe, I slowly wind on one frame after another, see the almost imperceptible changes, wind faster—a movement.

—Ingmar Bergman