Nobody thought it was possible to run a mile in less than four minutes. 

Until 70 years ago, one person did it. He believed he could, because he saw his run times improve slowly and steadily. 

Then a month after that, somebody else ran a mile in under four minutes. 

Since then, nearly 2,000 more people have done it. Remember, this was something that people didn’t realize was possible for centuries.

Fun fact: The first person was a medical student who trained for 45 minutes a day, not a full-time athlete. 

The next time you think you don’t have enough time, or that your other commitments are holding you back, give it a second thought.