A worthy rival is another player in the game that's worthy of comparison. They reveal our weaknesses that are opportunities to improve ourselves. <iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/5dtbhd11SYw" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>