David J. Schwartz

David J. Schwartz was an American motivational writer whose The Magic of Thinking Big has sold millions of copies since 1959 with its accessible case for cultivating ambitious, possibility-focused thinking.

David J. Schwartz was a professor of marketing at Georgia State University and a management consultant who channeled his professional experience into a self-help framework aimed at the aspiring professional and entrepreneur. The Magic of Thinking Big, first published in 1959, argues that the primary difference between successful and unsuccessful people is not native talent or luck but the size and quality of their thinking — and that thinking patterns can be deliberately changed. The book is an extended practical argument for cultivating belief in one’s own possibility, eliminating “excusitis” (the habit of self-limiting rationalization), and treating people with genuine attention and respect.

The book is a product of its era — post-war American optimism at its most expansive — and some of its examples, its implicit assumptions about professional life, and its gender dynamics feel dated today. But the core idea has shown considerable durability. Schwartz’s insistence that attitude shapes outcome, that small thinking produces small results, and that the barriers most people face are primarily internal remains a coherent and practically useful argument for many readers.

The Magic of Thinking Big is less psychologically sophisticated than later entries in the positive thinking genre, and it does not engage with structural barriers to success. It is best understood as a motivational framework for readers already positioned to benefit from bolder self-presentation and greater personal ambition. Within that scope, it delivers a clear and readable case that has resonated with millions of readers across generations.