Foege closed his speech with this line from the novel 'Cutting for Stone,' calling it unforgettable and hoping it would stick with graduates forever. For a man who had spent his career traveling the world to fight smallpox and other diseases — from Africa to the CDC to the Gates Foundation — the idea that home is defined by purpose rather than origin had been the guiding principle of his life. He told graduates that as he congratulated them on what they had done, he also hoped they would all find their way home.