"[My high school] coach, a 50-year-old named Jack Armstrong ... would shout, 'Remember—you’ve got to make your deposits before you can make a withdrawal!' ...
"Coach Armstrong came to mind in one of my first weeks on Wall Street, 35 years ago. I’d stayed up all night building a massive spreadsheet to be ready for a morning meeting. ... The partner on the deal, however, took one look at my work, spotted a tiny error, and went ballistic.
"As I sat there while he yelled at me, I realized I was getting the MBA version of Coach Armstrong’s words. Making an effort and meeting the deadline simply weren’t enough."
From a 2008 blog post at Harvard Business Review