When Muhammad Ali was asked if he liked training, he replied: "I hated every minute of training, but I said to myself, ‘Don’t quit, suffer now, and live the rest of your life as a champion.’" Ali prepared for his fights by pushing himself, no matter how much it hurt. That's what every tough-minded person do when they're trying to achieve something difficult. They power through the obstacles, and they don’t give up.
Success often has much more to do with perseverance than it does with a person's innate qualities. That isn't to say talent doesn't matter, just that it only goes so far without sacrifice and effort.
