I can imagine a world with no pilots, with no TV producers, with no presidents or prime ministers. But I can not imagine a world without doctors, without healers. Healing has to be one of those things that humans had to figure out very early in our evolution. So when I think about medicine, and being a doctor, I am in awe, that I am on the path to practicing a profession that is as old as humans. Am I even worthy to aspire to this vocation?