" He doesn’t say, ‘You have to do this by Friday at two P.M.,’” Brogan said. “He says, ‘I need the impossible done by Friday at two P.M. Can you do it?’ Then, when you say yes, you are not working hard because he told you to. You’re working hard for yourself. It’s a distinction you can feel. "

― Ashlee Vance , Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future