"...a section of a dark room is framed so that a reflection of a window with a curtain blowing is balanced by the curtain which moves on and off screen...Endurance establishes a balance of forces by spatially separating the reflection from the curtain, balancing them by repeating the undulating rhythm in counterpoint..." — Ellen Feldman, "A History of the American Avant-Garde Cinema" catalogue, A.F.A. traveling exhibition.