"In order to understand the stock market we have to realize that, like anything enormous and inert, it's fundamentally stable, and, like anything emotion-driven, it's volatile as hell. Got that? Me neither."

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A strategic plan based on the over-all situation of both belligerents is ... more stable, but it too is applicable only in a given strategic stage and has to be changed when the war moves towards a new stage. ... [Conversely, tactical plans may] ... have to be changed several times a day.

— Mao Zedong