"The most important thing in communication is hearing what isn't said."
"Management means, in the last analysis, the substitution of thought for brawn and muscle, of knowledge for folkways and superstition, and of cooperation for force. It means the substitution of responsibility for obedience to rank, and of authority of performance for the authority of rank."
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Source: Peter Drucker (2013). “People and Performance”, p.78, Routledge
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