>>Choose one thing and become a master of it. Choose a second thing and become a master of that. When you become a master of two worlds (say, engineering and business), you can bring them together in a way that will a) introduce hot ideas to each other, so they can have idea sex and make idea babies that no one has seen before and b) create a competitive advantage because you can move between worlds, speak both languages, connect the tribes, mash the elements to spark fresh creative insight until you wake up with the epiphany that changes your life.<p>This is absolutely true. People who can competently live in two different "modes" definitely have an advantage over those who are residents of just one. Steve Jobs, for instance, brought together engineering and design/aesthetics in a way that got Apple noticed and gave it massive competitive advantage over their competitors, who were perceived as boring, ugly and unoriginal. He wasn't a master engineer like Wozniak, and he wasn't a master designer like, say, Ive, but he had a very good understanding and appreciation for both and that's what made him special.<p>As a side note, there's something about Ms. Musk's writing that really appeals to me. It's clear, concise, and creative.