Gregory Battcock. New Artists’ Video, an anthology, (1978) p. xiii. Introduction:
Listing of the several general questions to which video art gave rise to in those days.
“If a work of art is to explore new environments, it is not to be regarded as a blueprint but rather as a form of action-painting.”
To Wilfred Watson, October 6 1965. Letters of Marshall McLuhan (1987), p. 325
1960s
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Marshall McLuhan 416
Canadian educator, philosopher, and scholar-- a professor … 1911–1980Related quotes

Richard Long: Books, Prints, Printed Matter. Exhib cat New York Public Library, New York 1994
1990s

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

Part 1: "The Creative Mind", §9 (p. 19)
Science and Human Values (1956, 1965)
Context: The discoveries of science, the works of art are explorations — more, are explosions, of a hidden likeness. The discoverer or the artist presents in them two aspects of nature and fuses them into one. This is the act of creation, in which an original thought is born, and it is the same act in original science and original art.

Quote in Kandinsky's letter to Arnold Schönberg, 18 Jan. 1911; as cited in Schonberg and Kandinsky: An Historic Encounter, by Klaus Kropfinger; edited by Konrad Boehmer; published by Routledge (imprint of Taylor & Francis, an informal company), 2003, p. 9
1910 - 1915

1915 - 1925, Theses on the 'PROUN': from painting to architecture' (1920)

http://web.archive.org/web/20081015182445/http://www.news.com.au/technology/story/0,25642,24493980-5014239,00.html
Other Articles
Gottlieb's quote on the attacks of critics on abstract art, 1948
Quote from Gottlieb's Lecture, given at 'Forum: the Artist Speaks', museum of Modern Art, New York, May 5, 1948.
1940s

Source: 1908 - 1920, quotes from Artists on Art...(1972), p. 423 - short quotes by Georges Braque on 'Means' - Paris, 1917