"The most important thing in communication is hearing what isn't said."
"Everything requires time. It is the only truly universal condition. All work takes place in time and uses up time. Yet most people take for granted this unique, irreplaceable, and necessary resource. Nothing else, perhaps, distinguishes effective executives as much as their tender loving care of time."
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Source: Peter Drucker (2012). “The Practice of Management”, p.11, Routledge
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