The author correctly explains the problem inherent in following your passion when you do not yet know yourself. However, following passion to guide your career is a terrible idea regardless of your age or how well you know yourself. There is never a good time to do this. Attaching passion, something so integral to your sense of self, to the task of paid employment binds your self-worth to a set of economic relationships that do not exist for your benefit and can dispose of you at any time. Having a calling is essential to leading a good life. But attempting to develop that sense of calling in relation to what you do for money puts a big part of your identity in the hands of people who do not care about you, have no loyalty to you, and do not have your interests at heart. It is much better to do work that accords with your conscience and to spend the rest of your time becoming the kind of person you want to be, rather than trying to square the circle of passion and worldly imperative.