Have you ever heard the story of the four-minute mile? For years people believed that it is impossible for a human being to  1  a mile in less than four minutes until Roger Banister proved it  2  in 1954£®Within one year, 37 runners  3  the belief barrier£®And the year after that, 300 other runners did the same thing£®

       What happens if you put an animal in a  4 ? Any animal, big or small, will swim its way through£®What happens when someone, who does not know how to swim, falls in deep waters? You  5 £®If an animal who has not learned swimming could  6  by swimming, why not you? Because you believe you will drown while the animal does not£®