Nothing fails like success because we don’t learn from it. We learn only from failure.

Kenneth Ewart Boulding (1910-1993) American economist, educator, poet, philosopher

“The diminishing returns of science,” New Scientist (25 Mar 1971)

Restated in Ecodynamics: A New Theory Of Societal Evolution (1978) as: "Nothing fails like success, because we do not learn anything from it. We only learn from failure, but we do not always learn the right things from failure."