“Conceptions are artificial. Perceptions are essential.”

Source: 1960s, Understanding Media (1964), p. 199

Source: 1990s and beyond, The Book of Probes : Marshall McLuhan (2011), p. 259

The Myth of Sisyphus (1942), An Absurd Reasoning

Source: Conceptual Structures, 1984, p. 76 as cited in: Jacques Demongeot (1988) Artificial intelligence and cognitive sciences. p. 179

Source: Artificial Life (1989), p.4-5 as cited in: Luis M. Rocha (2012) " The logical mechanisms of life http://informatics.indiana.edu/rocha/i-bic/lec02.html" on indiana.edu, August 27, 2012

Letter to Markus Fierz (1948)
Context: What now is the answer to the question as to the bridge between the perception of the senses and the concepts, which is now reduced to the question as to the bridge between the outer perceptions and those inner image-like representations. It seems to me one has to postulate a cosmic order of nature — outside of our arbitrariness— to which the outer material objects are subjected as are the inner images... The organizing and regulating has to be posited beyond the differentiation of physical and psychical... I am all for it to call this "organizing and regulating" "archetypes." It would then be inadmissible to define these as psychic contents. Rather, the above-mentioned inner pictures (dominants of the collective unconscious, see Jung) are the psychic manifestations of the archetypes, but which would have to produce and condition all nature laws belonging to the world of matter. The nature laws of matter would then be the physical manifestation of the archetypes.

"African threat to ban Sir Roy Welensky", The Times, 10 April 1962, p. 10
Speech at a meeting in Salisbury, Southern Rhodesia, 9 April 1962.
1960s

Source: Kritik der zynischen Vernunft [Critique of Cynical Reason] (1983), p. 535