In 1971, Bruce Lee said in the American TV series "Longstreet" what may be his most famous quote: "Be water, my friend." He was alluding to how people shouldn't allow themselves to be trapped in a certain mindset and should adapt and flow as their surroundings and circumstances change. The line went on to inspire Mohammad Sherafatmand, founder and CEO of water technology company Hydroleap. "You need to be adaptive; if you hit a roadblock, brave it," Sherafatmand told CNBC's "My Biggest Lessons." It's a mindset he's used while trying to disrupt the water purification industry.

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Persons: Bruce Lee, Longstreet, Mohammad Sherafatmand, Sherafatmand, CNBC's, Mohammad Sherafatmand's