"The key is not to worry about being successful but to instead work toward being significant." — Oprah Winfrey, media mogul. (Net worth: $2.8 billion)
"Success is walking from failure to failure with no loss in enthusiasm." — Donald Trump, business magnate. (Net worth: $3.2 billion)
"I'm not really interested in making money. That's always come as the result of success, but it's not been my goal. I've always had a tough time proving that to people." — Steven Spielberg, filmmaker. (Net worth: $3.2 billion)
"Success is how well you do what you do when no one is looking." — John Paul DeJoria, co-founder of Paul Mitchell and The Patron Spirits Company (Net worth: $3.2 billion)
"The idea of lying on a beach as my main thing, sounds horrible to me. I would go bonkers. I like high intensity." — Elon Musk, business magnate. (Net worth: $2.7 billion)
"My definition of failure became not trying." — Sara Blakely, founder of Spanx. (Net worth: $1 billion)
"Success is a lousy teacher. It seduces smart people into thinking they can't lose." —Bill Gates, founder of Microsoft. (Net worth: $67 billion)
"You are only as successful as the people who work for you want you to be." — Leonard Lauder, former chief executive of The Estee Lauder Companies, Inc. (Net worth: $8.1 billion)
"My definition of success? The more you're actively and practically engaged [in your business], the more successful you will feel." — Richard Branson, founder of Virgin Group. (Net worth: $5 billion)
"I've never run into a guy who couldn't win at the top level and didn't have the right attitude, didn't give it everything he had." — Ted Turner, media mogul. (Net worth: $2 billion)
