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.
Unlimited Power: The New Science of Personal Achievement (ed. Simon and Schuster, 2012) - ISBN: 9781471105654