Who gets to decide your limits? What is possible and what is not? Think about this for a moment: Right now, human beings are capable of running a mile in under 4 minutes.
This might not seem like a really big deal. We are used to hearing about runners achieving this amazing feat. Until 1954, however, most people thought it would be impossible.
Roger Bannister was the first one to achieve this tremendous milestone. He did so by constantly visualizing his achievement.
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