“The better a man is, the more mistakes will he make - for the more new things he will try. I would never promote a man into a top level job who had not made mistakes, and big ones at that. Otherwise he is sure to be mediocre.”
Source: 1930s- 1950s, The Practice of Management (1954), p. 147
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Peter F. Drucker 180
American business consultant 1909–2005Related quotes

“He who never makes a mistake, never makes anything.”
Variant: He who never makes a mistake never makes anything. It's part of learning the job.
Source: Revenge of the Witch

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 117.

Said to Enver Hoxha, on his visit to China in 1956, as quoted in Hoxha's (1986) The Artful Albanian, (Chatto & Windus, London), ISBN 0701129700

“He who does nothing makes no mistakes; he who makes no mistakes learns nothing.”
In Search of the Miraculous (1949)

“The only man who makes no mistakes is the man who never does anything.”
As quoted by Jacob A. Riis in Theodore Roosevelt, the Citizen (1904), chapter XVI A Young Men's Hero http://www.bartleby.com/206/16.html
1900s