“Success always obsoletes the very behavior that achieved it.”
Source: 1960s - 1980s, MANAGEMENT: Tasks, Responsibilities, Practices (1973), Part 1, p. 88
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Peter F. Drucker 180
American business consultant 1909–2005Related quotes
Source: The Future As History (1960), Chapter II, Part 1, The Impact of the Bomb, p. 64
Source: https://www.youtube.com/watch?v=bz7pTxwy1dI Interview on Youtube

“That some achieve great success, is proof to all that others can achieve it as well.”
Source: The Age of Reform: from Bryan to F.D.R. (1955), Chapter VI, part II, p. 245
Source: Paul W. Glimcher (2004). Decisions, Uncertainty, and the Brain.

[‘Failures are positive steps for success', https://www.deccanherald.com/failures-are-positive-steps-700395.html, Deccan Herald, 28 October 2018]

Variant: The difference between successful people and really successful people is that really successful people say no to almost everything.