The Guiding Question

A teacher from one of my classes once said that in order to keep your life directed, always ask yourself, "What can I do for the world today?"

Well, what can I do for the world today? Study how to label parts of a vertebra so that I could be a capable doctor people can depend on? I still don't see where knowing precisely the proper order of the words used in naming parts of a bone will direct me in the future, but seeing the end result, I'll try my best.