Dr. David Schwartz

Believe it can be done. When you believe something can be done, really believe, your mind will find the ways to do it. Believing a solution paves the way to solution.

Source: The Magic of Thinking Big, David J. Schwartz, 1959

This is Schwartz's thesis statement from the opening chapter of The Magic of Thinking Big (1959) — 'Believe it can be done' is the book's framing formula and the 'believing a solution paves the way to solution' line is quoted from it routinely. Confident in book and date; page not verified. Note the byline should be David J. Schwartz, not 'Dr. David Schwartz'.