“Two pictures painted in the year 1907 can conveniently be taken as the starting point of twentieth-century art. They are Matisse's Blue Nude and Picasso's Demoiselles d'Avignon; and both these cardinal, revolutionary pictures represent the nude. The reason is that the revolt of twentieth-century painters was not against academicism: that had been achieved by the impressionists. It was a revolt against the doctrine, with which the impressionists implicitly agreed, that the painter should be no more than a sensitive and well-informed camera. And the very elements of symbolism and abstraction that made the nude an unsuitable subject for the impressionists commended it to their successors. When art was once more concerned with concepts rather than sensations, the nude was the first concept that came to mind.”
Source: The Nude: A Study in Ideal Form (1951), Ch. IX: The Nude As an End in Itself
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Kenneth Clark 47
Art historian, broadcaster and museum director 1903–1983Related quotes
Review of The Painter's Eye and The Nude (1957).

Quote of Monet; as cited in Stephen Lucius Gwynn Claude Monet and His Garden: The Story of an Artist's Paradise, Macmillan, 1934, p. 69: Comment by Monet to the English biographer Sir Evan Charteris.
after Monet's death

“A painter paints his pictures on canvas. But musicians paint their pictures on silence.”
Addressing an audience at Carnegie Hall, as quoted in The New York Times (11 May 1967); often this is quoted without the humorous final sentence.
Context: A painter paints his pictures on canvas. But musicians paint their pictures on silence. We provide the music, and you provide the silence.
Source: The Nude: A Study in Ideal Form (1951), Ch. V: Energy

Quote of De Vlaminck before 1915; as cited in Derain et Vlaminck: 1900-1915, by Jacqueline Munck and Maïthé Vallès-Bled; catalogue of Lodeve Museum, 2001, p. 23 - ISBN 10: 8820214903 / ISBN 13: 9788820214906
Quotes dated

“Ads are the cave art of the twentieth century.”
quoted in Advertising Age, Sep. 3, 1976
1970s
Variant: Advertising is the greatest art form of the twentieth century
Context: Advertising is the greatest art form of the twentieth century.

"The Painter in the Press", X magazine, Vol. I, No.4 (October 1960).
Context: The Art of painting is itself an intensely personal activity… a picture is a unique and private event in the life of the painter: an object made alone with a man and a blank canvas... A real painting is something which happens to the painter once in a given minute; it is unique in that it will never happen again and in this sense is an impossible object... And it is something which happens in life not in art: a picture which was merely the product of art would not be very interesting and could tell us nothing we were not already aware of. The old saying, “what you don’t know can’t hurt you”, expresses the opposite idea to that which animates the painter before his canvas. It is precisely what he does not know which may destroy him.