“…in the whole range of human activities, war most closely resembles a game of cards.”
On War (1832), Book 1
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Carl von Clausewitz 68
German-Prussian soldier and military theorist 1780–1831Related quotes

Variants: It should be noted that the games of children are not games, and must be considered as their most serious actions.
For truly it is to be noted, that children's plays are not sports, and should be deemed as their most serious actions.
Book I, Ch. 23
Attributed

The Lords and the New Creatures: Poems (1969), The Lords: Notes on Vision

Presque tous les hommes ressemblent à ces grands palais déserts dont le propriétaire n'habite que quelques pièces; et il ne pénètre jamais dans les ailes condamnées.
Journal, 1932-1939 (Paris: Table ronde, 1947) p. 6; Adrienne Foulke (trans.) Second Thoughts (Plainview, NY: Books for Libraries Press, [1961] 1973) p. 142.
Quoted in "Linux Game Publishing: An Interview With Michael Simms" http://web.archive.org/web/20050712080821/http://www.linuxgazette.com/node/10249 Linux Gazette (2005-06-03)

“Humour is by far the most significant activity of the human brain.”
Daily Mail (London, January 29, 1990).

Rally in 1980, related to the then-ongoing Singapore Airlines pilot strikes due to salary issue http://www.bbc.com/news/world-asia-32012346
1980s