One could say Bill McDermott is a natural-born entrepreneur. When he was 16, he began working at a deli and soon owned the business. Today, McDermott is the CEO of SAP (SAP), a software company that placed number 462 on our 2016 Global 500 list. He is no stranger to hard work, having grown up in a working-class home. He has a uniquely optimistic spirit, and believes a person becomes a serious leader when they can control their mind and let their will supersede. Listen to this week’s episode of our Fortune Unfiltered podcast to learn more about his rise to success and his admiration for work.