What separates people who are truly successful from those who never will be?

Lots of things, come to think of it--but one of the most crucial is having the right mindset.

How do you train yourself to adopt that kind of entrepreneurial and successful mindset? Partly by looking to the right sources for inspiration. With that in mind--and following up on my recent post, 30 of the Most Inspiring Things Anyone Ever Said--here are 31 incredibly inspiring quotes to get you going.

1. "Give me a stock clerk with a goal, and I will give you a man who will make history. Give me a man without a goal, and I will give you a stock clerk."
--James Cash Penny, founder of J.C. Penney department stores, aficionado of initials.

2. "Your time is limited, so don't waste it living someone else's life."
--Steve Jobs, guy behind the device you're probably reading this on.

3. "I would rather die of passion than of boredom."
--Vincent van Gogh, 19th century Dutch painter, best known for cutting his own ear off.

4. "If you want your children to turn out well, spend twice as much time with them, and half as much money."
--Abigail Van Buren, author of the incredibly successful 20th century "Dear Abby" advice column; ironically half of one of history's greatest sibling rivalries.

5. "If it scares you, it might be a good thing to try."
-- Seth Godin, marketing guru and blogger extraordinaire.

6. "Creativity is intelligence having fun."
-- Albert Einstein, Nobel prize-winning physicist and guy on posters in 7 percent of American college dorm rooms.

7. "Believe you can and you're halfway there."
--Theodore Roosevelt, president, Medal of Honor recipient, "Night at the Museum" character.

8. "I didn't fail the test. I just found 100 ways to do it wrong."
--Benjamin Franklin, coolest of the Founding Fathers.

9. "Life is not measured by the number of breaths we take, but by the moments that take our breath away."
--Maya Angelou, author, thinker, poet who was quite aware of it.

10. "Numbing the pain for a while will only make it worse when you finally feel it."
--Albus Dumbledore, "Harry Potter" character, generational litmus test.

11. "Nothing is impossible, the word itself says, 'I'm possible!'"
--Audrey Hepburn, actress who won Academy, Tony, Emmy, and Grammy awards.

12. "People who say it cannot be done should not interrupt those who are doing it."
--George Bernard Shaw, playwright, only person to win both an Academy Award and a Nobel prize.

13. "There are those who look at things the way they are, and ask why... I dream of things that never were, and ask why not?"
--Robert F. Kennedy, senator and attorney general (who, 50 years ago, climbed Mt. Kennedy).

14. "Everything has beauty, but not everyone can see."
--Confucius, Chinese philosopher who is reputed to have said most of the quotes you read on the Internet.

15. "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do, so throw off the bowlines, sail away from safe harbor, catch the trade winds in your sails. Explore, Dream, Discover.
--Mark Twain, American author and ghostwriter.

16. "If you look at what you have in life, you'll always have more. If you look at what you don't have in life, you'll never have enough."
--Oprah Winfrey, media mogul, talk show host, gift-giver.

17. "When everything seems to be going against you, remember that the airplane takes off against the wind, not with it."
--Henry Ford, automobile entrepreneur, quote machine.

18. "You miss 100 percent of the shots you don't take."
--Wayne Gretzky, incredible athlete, mediocre coach.

19. "When one door of happiness closes, another opens, but often we look so long at the closed door that we do not see the one that has been opened for us."
--Helen Keller, person with greatest attitude in history.

20. "I never dreamt of success. I worked for it."
--Estee Lauder, entrepreneur and inspirer.

21. "The only person you are destined to become is the person you decide to be."
--Ralph Waldo Emerson, poet and playwright who would be surprised to find his name on this list, not least because he died 100 years before the Internet.

22. "We must believe that we are gifted for something, and that this thing, at whatever cost, must be attained."
--Marie Curie, physicist, chemist, overcomer of barriers.

23. "If you're offered a seat on a rocket ship, don't ask what seat! Just get on."
--Sheryl Sandberg, COO of Facebook, incredible book saleswoman.

24. "Don't live the same year 75 times and call it a life."
--Robin Sharma, author and speaker.

25. "Few things can help an individual more than to place responsibility on him, and to let him know that you trust him."
--Booker T. Washington, African-American leader, author, and advisor to presidents, who died 100 years ago.

26. "Education costs money. But then so does ignorance."
--Sir Claus Moser, British statistician.

27. "It is never too late to be what you might have been."
--George Eliot, pen name of Mary Ann Evans, 19th century British author of Middlemarch, among other works.

28. "Live your life as an exclamation, not as an explanation."
--H. Jackson Brown, Jr., author of Life's Little Instruction Book.

29. "How wonderful it is that nobody need wait a single moment before starting to improve the world."
--Anne Frank, Holocaust victim, author of perhaps the most widely read personal journal in history.

30. "Do not let what you cannot do interfere with what you can do."
--John Wooden, UCLA head basketball coach, winner of 10 national championships.

31. "I have learned over the years that when one's mind is made up, this diminishes fear."
--Rosa Parks, African-American civil rights activist.