Benjamin Carson: Medicine has always been the only career that I considered, but the aspect of medicine changed. It went from missionary doctor to psychiatrist and then I toyed for a while with the idea of being a cardiovascular surgeon. But, as I began in medical school — toward the end of my first year — to realize that I really didn’t want to do psychiatry, and I felt that although cardiothoracic surgery was challenging, that it didn’t offer me enough variety of cases. And then I said, “Well, what’s an area where you could become an authority very quickly?” and I said, “The brain, because nobody knows anything about the brain.” And I spent all those years thinking I was going to be a psychiatrist. So, I already knew quite a lot about the brain. So, it was toward the end of my first year in medical school that I decided that neurosurgery was going to be the right field for me.