.. the modern artist can conclude that impulsive and speculative production has come to an end. THE ERA OF DECORATIVE TASTE HAS VANISHED, the artist of today has finished completely with the past. Scientific and technical developments oblige him to draw conclusions.... to revise his means, to establish laws creating a system, that is to say, to master his elementary means of expression in a conscious manner.
quote from his article: 'Towards elementary plastic expression', in 'Material zur elementaren Gestaltung', G-1, July 1923; as quoted in 'Theo van Doesburg', Joost Baljeu, Studio Vista, London 1974, p. 141