This "finding a career" thing is tricky business.
You go to college and major in one thing -- but find yourself in a job opposite from what you spent four years studying. Or, you land a job that's exactly in line with your college major -- but discover it's not what you had in mind. Or even still, you score a gig doing what you love and are content for many years -- until you get bored and want to make a switch.
So what happens to the experience you've gained from your current job and those before it? What about the hours, years and dollars spent studying this vocation in school? Do you really have to start at square one if you decide to drastically switch careers?