Ronda Rousey is one of the most popular female athletes in the world. The 28-year-old UFC multimillionaire started at the bottom and, like any self-made entrepreneur, worked her ass off, eventually earning an Olympic medal in judo and rising to prominence in a male-dominated combat sport. Rousey built herself into a household name as she piled up win after win in the UFC, with contests lasting mere seconds. She became Bantamweight Champion and revealed she is the highest paid UFC fighter. It seemed nobody could stop her. But whether it's business or sports, failure is inevitable (so don't be afraid to fail). A record number of viewers tuned in to her most recent fight against Holly Holm. , …

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That’s what Cassius Clay—who later changed his name toMuhammad Ali—said in a poem before his epic victory over Sonny Liston at the world heavyweight championship match 50 years ago this week. Clay was just 22 years old at the time and went on to a legendary boxing career. A half century later, that boxing match has been named the fourth greatest moment in sports of the 20th century by Sports Illustrated, and Ali is known as not only one of the best athletes of all time, but one of the biggest figures in pop culture. His quotes, which range from pompous to profound, played as big a part in his rise to fame as his victories in the ring.,