- Peter Drucker
- Vince Lombardi
- Bill Gates
- Warren Buffett
- Thomas Edison
- Albert Einstein
- Donald Trump
- Winston Churchill
- Thomas Edison
- Napoleon Hill
- Bill Cosby
- Bo Bennet
- Warren G. Tracy’s student
- Corneille
- Christopher Morley
- Napoleon Hill
- Albert Schweitzer
- Johann Wolfgang von Goethe
- Malcolm Forbes
- Jim Rohn
- Adam Osborne
- John C. Maxwell
- Ralph Nader
- Confucius
- Bill Gates