“There was a kid in front of me who was 10. My dad, just to pass the time, said, ‘What do you want to be when you grow up?’ The kid said, ‘I don’t know, I’m 10.’ My father waited until he was out of earshot and said: ‘I never want you to tell me that if I ask you that question. I never want you tell me you don’t know. It’s O.K. if you change your mind. But I never want you not to have a vision of what you want to be.' I told him that day that I wanted to be a doctor. And I never changed my mind.”