This occurred to me and I wanted to write this down in case I forget it when I'm fully awake later today. I think I might've used this in a college essay anyway. Maybe historians or biographers will one day try to document my life and trace my career back to this notion and quote me on it. I wouldn't mind being quoted on this.
How to find your passion: read Wikipedia articles any time you come across them until you find something that makes you browse related link after related link. That's where your passion lies.
My passion: social psychology. It started with a link to the Milgram Experiment that I got from a friend who in turn received the link from a Scandinavian hermit on Omegle back in sophomore year. Since then, Stanford Prison Experiment, Zimbardo, Hofling Hospital Experiment, and so on and so forth. I even wrote my EE on the extent to which social psychology experiments of the 60s and 70s can be used to justify Nazi behavior in WWII.
Alternate, far less noble passion: romcom actors and actresses...