“The fact is that no contradictory aspect can exist in isolation. Without its opposite aspect, each loses the condition for its existence”
On Contradiction (1937)
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Mao Zedong 181
Chairman of the Central Committee of the Communist Party of… 1893–1976Related quotes

“Each character is an allegory for every aspect of human existence.”
Vanna Bonta Talks About Quantum fiction: Author Interview (2007)

"Modern Examples of Background Physics" ["Moderne Beispiele zur Hintergrundsphysik"] (1948) as translated by David Roscoe in Atom and Archetype (1992) edited by Carl Alfred Meier
Context: It seems significant that according to quantum physics the indestructibility of energy on one hand — which expresses its timeless existence — and the appearance of energy in space and time on the other hand correspond to two contradictory (complementary) aspects of reality. In fact, both are always present, but in individual cases the one or the other may be more pronounced.

Quote in 'Plastic Art and Pure Plastic Art', Piet Mondrian (1937), in 'Documents of modern Art', for Wittenborn, New York 1945, p. 13; as quoted in Abstract Expressionist Painting in America, W.C, Seitz, Cambridge Massachusetts, 1983, p. 55
1930's
Source: The Next Development in Man (1948), p. 254