I am grateful to Matthew Pianetta for calling my attention to this wonderful quotation from the entrepreneurial Admiral Hyman G. Rickover:
(p. 239) “Efficiency isn’t the objective, Dunford, effectiveness is. Don’t confuse effectiveness with efficiency. I’m convinced that the only way to be effective, to make a difference in the real world, is to put ten times as much effort into everything as anyone else thinks is reasonable. It doesn’t leave any time for golf or cocktails, but it gets things done.”
Rickover as quoted in Rockwell, Theodore. The Rickover Effect: How One Man Made a Difference. Lincoln, NE: iUniverse, Inc., 2002.
(Note: paging of quote seems same in both 1992 and 2002 editions.)