 
                            
                        
                        
                        
                                        
                                        as quoted in: Marc Chagall, – a Biography, Sidney Alexander, Cassell, London, 1978, p. 178 
1910 - 1920
                                    
            St. 4 
The Tower (1928),  Sailing to Byzantium http://poetry.poetryx.com/poems/1575/ 
Context: Once out of nature I shall never take
My bodily form from any natural thing,
But such a form as Grecian goldsmiths make
Of hammered gold and gold enamelling
To keep a drowsy Emperor awake;
Or set upon a golden bough to sing
To lords and ladies of Byzantium
Of what is past, or passing, or to come.
        
                                        
                                        as quoted in: Marc Chagall, – a Biography, Sidney Alexander, Cassell, London, 1978, p. 178 
1910 - 1920
                                    
                                        
                                        Quote in a letter to Sherwood Anderson, October 1923; as quoted in Georgia O'Keeffe: A Life, Roxana Robinson, University Press of New England, 1999 
1917 - 1929
                                    
“No form of Nature is inferior to Art; for the arts merely imitate natural forms.”
                                        
                                        Meditations. xi. 10. 
Bartlett's Familiar Quotations, 10th ed. (1919)
                                    
                                        
                                        quote from her Diaries, 1 October, 1902; as cited in Expressionism, a German intuition, 1905-1920, Neugroschel, Joachim; Vogt, Paul; Keller, Horst; Urban, Martin; Dube, Wolf Dieter; (transl. Joachim Neugroschel); publisher: Solomon R. Guggenheim Foundation, New York, 1980, p. 31 
1900 - 1905
                                    
                                        
                                        Goya, in a recall of an overheard conversation 
conversation of c. 1808, in the earliest biography of Goya: Goya, by Laurent Matheron, Schulz et Thuillié, Paris 1858; as quoted by Robert Hughes, in: Goya. Borzoi Book - Alfred Knopf, New York, 2003, p. 176 
probably not accurate word for word, but according to Robert Hughes it rings true in all essentials, of the old Goya, in exile 
1800s
                                    
                                        
                                        As quoted in  https://alphahistory.com/russianrevolution/quotations-imperial-russia-tsarism/ 
1890s
                                    
                                        
                                        Quote of Picabia, in an interview in an American newspaper, 1915; as quoted by William A. Camfield, in Francis Picabia: His Art, Life and Times, Princeton, 1979, p.77 
Picabia emphasised that line took precedence over colour in his works since 1915 
1910's
                                    
                                        
                                        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
                                    
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        