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 RobbinsAny time you sincerely want to make a change, the first thing you must do is to raise your standards. When people ask me what really changed my life eight years ago, I tell them that absolutely the most important thin was changing what I demanded of myself. I wrote down all the things I would no longer accept in my life, all the things I would no longer tolerate, and all the things that I aspired to becoming.
Tony Robbins