As hard as we might try to accomplish everything we've set our minds to do, obstacles and roadblocks can stand in the way of our success. While we may normally take these obstacles and roadblocks in stride, some days it seems like nothing goes right for us. The result? We feel down and wonder what it's going to take to get ourselves back on track.

This is when it's time to take a step back from whatever it is we're doing, recharge our batteries, and inspire ourselves to try again and again--until we achieve our goal. Here are 17 super positive quotes that will inspire you to be exceptional--and to reach for the stars (and catch them!).

1. "Be patient with yourself. Self-growth is tender; it's holy ground. There's no greater investment." --Stephen Covey

2. "You must expect great things of yourself before you can do them." --Michael Jordan

3. "The best and most beautiful things in the world cannot be seen or even touched--they must be felt with the heart." --Helen Keller

4. "We know what we are, but know not what we may be." --William Shakespeare

5. "Many of life's failures are people who did not realize how close they were to success when they gave up." --Thomas A. Edison

6. "I alone cannot change the world, but I can cast a stone across the water to create many ripples." --Mother Teresa

7. "Start by doing what's necessary; then do what's possible; and suddenly you are doing the impossible." --Francis of Assisi

8. "Try to be a rainbow in someone's cloud." --Maya Angelou

9. "Don't let the fear of losing be greater than the excitement of winning." --Robert Kiyosaki

10. "To me, business isn't about wearing suits or pleasing stockholders. It's about being true to yourself, your ideas and focusing on the essentials." --Richard Branson

11. "Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world." --Harriet Tubman

12. "I can't change the direction of the wind, but I can adjust my sails to always reach my destination." --Jimmy Dean

13. "In the end, it's not the years in your life that count. It's the life in your years." --Abraham Lincoln

14. "The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle. As with all matters of the heart, you'll know when you find it." --Steve Jobs

15. "Put your heart, mind, and soul into even your smallest acts. This is the secret of success." --Swami Sivananda

16. "Perfection is not attainable, but if we chase perfection, we can catch excellence." --Vince Lombardi

17. "The most important thing is to enjoy your life--to be happy--it's all that matters." --Audrey Hepburn