Writer, teacher, consultant Peter F. Drucker, on figuring out where one belongs:
A small number of people know very early where they belong. Mathematicians, musicians, and cooks, for instance, are usually mathematicians, musicians, and cooks by the time they are four or five years old. Physicians usually decide on their careers in their teens, if not earlier. But most people, especially highly gifted people, do not really know where they belong until they are well past their mid-twenties. By that time, however, they should know the answers to the three questions: What are my strengths? How do I perform? and, What are my values? And then they can and should decide where they belong.
Managing Oneself (Boston: Harvard Business School Press, 2008)