"The most important thing in communication is hearing what isn't said."
"What is the major problem? It is fundamentally the confusion between effectiveness and efficiency that stands between doing the right things and doing things right. There is surely nothing quite so useless as doing with great efficiency what should not be done at all."
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Source: Peter Drucker, Harvard Business Review (2016). “The Peter F. Drucker Reader: Selected Articles from the Father of Modern Management Thinking”, p.33, Harvard Business Review Press
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