Yield Number Four is a fragmented diamond. I broke the four shields into separate canvases so that it's four separate canvases, four diamonds, brought together to form a larger diamond. And that is going back to a harmony that I have not used since The Calumet. It will be a very red and yellow painting, no other color, so that colorwise it's entirely different, entirely different [from the earlier Yield Brother paintings].
— Robert Indiana
Richard Brown Baker, Oral history interview with Robert Indiana, 1963 Sept. 12–Nov. 7, Archives of American Art, Smithsonian Institution.