Anatol Rapoport, Conflict in man-made environment. Harmondsworth: Penguin Books, 1974; As cited in M.J. Apter, J.H. Kerr, S. Murgatroyd (1993) Advances in Reversal Theory. p. 63-64
1970s and later
“Aesthetics is related to every particular conflict; to everyday conflict.”
Everything Has to Do with Hardness and Softness (1969)
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Eli Siegel 19
Latvian-American poet, philosopher 1902–1978Related quotes
Philosophy as Rigorous Science and Political Philosophy (1971)

Beast and Man: The Roots of Human Nature (1979). 168.
Context: Creatures really have divergent and conflicting desires. Their distinct motives are not (usually) wishes for survival or for means-to-survival, but for various particular things to be done and obtained while surviving. And these can always conflict. Motivation is fundamentally plural. It must be so because, in evolution, all sorts of contingincies and needs arise, calling for all sorts of different responses. An obsessive creature, constantly dominated by one kind of motive, would not survive.
Source: 1960s, Conflict and defense: A general theory, 1962, p. 2, partly cited in: Dennis Sandole (1998) A Comprehensive Mapping Of Conflict And Conflict. Resolution: A Three Pillar Approach http://www.gmu.edu/programs/icar/pcs/sandole.htm

“In a state of conflict or a conflicted state.”
Source: Hitch-22: A Memoir
“Every resistance reveals the ego (one's own) in conflict with another.”
Sadism and Masochism : The Psychology of Hatred and Cruelty, Vol. 1 (1939), p. 46
Context: An intense, unyielding stubbornness hides beneath an apparent obedience (the patient brings a vast number of dreams; his associations become endless; he produces an inexhaustible number of recollections, which seem to him very important but are actually of little moment; or he goes off upon some byroad suggested by the analyst and leads the latter into a blind alley).
The child manifests the same reactions of defiance and obedience. The child, too, can hide his stubbornness behind an excessive docility (the parent's command: You must be industrious. Industry may become a mania so that the child neither goes out nor has time to sleep). Obedience is the giving up of the resistance; obstinacy the setting up of fresh resistances. This resistance is externally active. We have in recent years had sufficient opportunity to observe the law of resistance (the passive resistance). Activity and defiance show great differences. Defiance is the reaction against activity (aggression) of the environment. It may then manifest itself actively or passively and stands in the service of the defensive tendency of the ego. Every resistance reveals the ego (one's own) in conflict with another.

“There is no conflict in the absolute universe, but there is conflict in the relative world.”
10 : The principle of non-dissension
Ki Sayings (2003)
Context: There is no conflict in the absolute universe, but there is conflict in the relative world. If we unify our mind and body become one with the universe, others will follow us gladly. Do not say that this is a world where we must struggle to live each day. The true way to success is exactly one and the same as the principle of non-dissension, and that is the way of peace.
Relational Concepts in Psychoanalysis (Cambridge, Massachusetts: Harvard University Press, 1988), p. 66

“Peace is not the absence of conflict, but the ability to cope with conflict by peaceful means.”
"Address at Commencement Exercises at Eureka College in Illinois," May 9, 1982. Online by Gerhard Peters and John T. Woolley, The American Presidency Project. http://www.presidency.ucsb.edu/ws/?pid=42501
1980s, First term of office (1981–1985)