A work based only on a line concept is scarcely more than a illustration; it fails to achieve pictorial structure. Pictorial structure is based on a plane concept. The line originates in the meeting of two planes ... we can lose ourselves in a multitude of lines, if through them we lose our senses for the planes.
Hans Hofmann, Sara T. Weeks, Bartlett H. Hayes (1967). “Search for the Real: And Other Essays”, p.65, MIT Press
