I try to deal with things that maybe other people haven't thought about, emptiness, making a painting that isn't a painting. For years people have been concerned with what goes on inside the frame. Well maybe there is something going on outside the frame that could be considered an artistic idea.

Robert Barry (1968), cited in: Lucy R. Lippard, Six Years: The Dematerialization of the Art Object from 1966 to 1972. New York, Praeger, 1973, p. 40. p. xii