Individuals who succeed have a belief in the power of commitment. If there's a single belief that seems almost inseparable from success, it's that there's no great success without commitment. If you look at successful people in any field, you'll find they're not necessarily the best and the brightest, the fastest and the strongest. You'll find they're the ones with the most commitment.
Tony RobbinsTo have an extraordinary quality of life you need two skills: the science of achievement (the ability to take anything you envision and make it real) and the art of fulfillment (this allows you to enjoy every moment of it.
Tony Robbins