"The most important thing in communication is hearing what isn't said."
"Brilliant men are often strikingly ineffectual. They fail to realize that the brilliant insight is not by itself achievement. They never have learned that insights become effectiveness only through hard systematic work."
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Source: Peter F. Drucker (2017). “The Effective Executive: The Definitive Guide to Getting the Right Things Done”, p.1, HarperCollins
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