B.C Forbes (May 14, 1880 – May 6, 1954), the found of Forbes Magazine, had a great quote about winners:
History has demonstrated that the most notable winners usually encountered heartbreaking obstacles before they triumphed. They won because they refused to become discouraged by their defeats.
You often hear this type of statement said by a lot of the champions in various fields, including mixed martial arts. If you read Georges St-Pierre's autobiography "The Way of the Fight", he had to overcome a lot of obstacles on the road to becoming one of the greatest fighters in the history of the game. Not only is his ability to win the belt amazing, but even more impressive is to regain it after losing it, and then defend it eight times.