When You Believe I-Can-do-it, the How-to-do-it Develops.
This quote was gotten from a book authored by David J. Schwartz titled The Magic of Thinking Big.
About David J. Schwartz
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.