I was not talented enough to run and smile at the same time
It's at the borders of pain and suffering that the men are separated from the boys.
If you come to think of it, you never see deer, dogs and rabbits worrying about their menus and yet they run much faster than humans.
It is not necessary to smile and make a wonderful impression on the judges.
If you want to run, run a mile. If you want to experience a different life, run a marathon.
By a persistent effort of will it is possible to change the whole body. The athlete must always keep in mind this concept of change and progression. He must never accept his limitations as being permanent, because they are not.