As quoted in "American Modernists in Painting take the Public into their Confidence" in Current Opinion Vol LX, No. 5 (May 1916), p. 351 
Context: Throughout time painting has alternately been put to the service of the Church, the State, arms, individual patronage, scientific phenomena, anecdote and decoration … all the marvelous works that have been painted, whatever the sources of inspiration, still live for us because of absolute qualities they possess in common. The creative force and the expressiveness of painting reside materially in the colour and texture of pigments, in the possibilities of form invention and organisation, and in the flat plane on which these elements are brought into play.
                                    
“Throughout time painting has alternately been put to the service of the Church, the State, arms, individual patronage, scientific phenomena, anecdote and decoration … all the marvelous works that have been painted, whatever the sources of inspiration, still live for us because of absolute qualities they possess in common. The creative force and the expressiveness of painting reside materially in the colour and texture of pigments, in the possibilities of form invention and organisation, and in the flat plane on which these elements are brought into play.”
As quoted in "American Modernists in Painting take the Public into their Confidence" in Current Opinion Vol LX, No. 5 (May 1916), p. 351
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Man Ray 18
American artist and photographer 1890–1976Related quotes
                                        
                                        Quote from De Cirico's text  'A DISCOURSE ON THE MATERIAL SUBSTANCE OF PAINT', 1942 http://www.fondazionedechirico.org/wp-content/uploads/541-547Metafisica5_6.pdf, p. 542 
1920s and later
                                    
                                        
                                        Quote from Denis' Journal, 1930; as cited on  Wikipedia: Maurice Denis https://en.wikipedia.org/wiki/Maurice_Denis - reference [43] 
1921 and later
                                    
Time and Individuality (1940)
                                        
                                        1910s 
Source: 'Merz Painting' (1919); as quoted in I is Style, ed. Siegfried Gohr & Gunda Luyken, NAI Publishers, Rotterdam 2000, p. 91.
                                    
Robin Hartshorne Fine Art, fineartstudioonlione.com http://robinfaso.fineartstudioonline.com/about
                                        
                                        Quote in La Pittura dei suoni, rumori, odori Carrà, 11 Aug 1913, as quoted in Futurism, ed. By Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 142 
1910's