David Joseph Schwartz Quotes
How much we can do, depends on how much we THINK we can do.
Citations
Schwartz, David J. The Magic of Thinking Big. Prentice-Hall, 1959, p. 95.
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David Joseph Schwartz, Jr. was an American motivational writer and coach, best known for authoring The Magic of Thinking Big in 1959. He was a professor of marketing, chairman of the department, and Chair of Consumer Finance at Georgia State University.