“These universal means of expression were discovered in modern painting by a logical and gradual progress toward ever more abstract form and color. Once the solution was discovered, there followed the exact representation of relations alone, that is to say, of the essential and fundamental element in any plastic emotion of the beautiful.”
1910's, Natural Reality and Abstract Reality', 1919
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Piet Mondrian 95
Peintre Néerlandais 1872–1944Related quotes
Quote from Denis' Journal, 1930; as cited on Wikipedia: Maurice Denis https://en.wikipedia.org/wiki/Maurice_Denis - reference [43]
1921 and later

Quote in Mondrian's letter to Rudolf Steiner, c. 1921-23; as cited in Abstract Painting, Michel Seuphor, Dell Publishing Co 1964, p. 83-85
1920's

Source: The Principles of Art (1938), p. 269

Creative spirit becomes concrete.
Quote on 'Concrete art', in: 'Comments on the basic of concrete painting', Paris, January 1930; 'Art Concret', April 1930, pp. 2–4
1926 – 1931

Quote from Van Doesburg's text 'Towards elementary plastic expression', as cited in Material zur elementaren Gestaltung, G-1, July 1923; as quoted in 'Theo van Doesburg', Joost Baljeu, Studio Vista, London 1974, p. 141
1920 – 1926
'Search for the Real in the Visual Arts', p. 46
Search for the Real and Other Essays (1948)