I think that's the one mistake people make when pondering a career change. They say to themselves, "What if it doesn't work out?" But they don't answer the question! What if it doesn't? You know what? You'll live.
I think the most important question is, "What if it does work out?" Maybe you can't handle that kind of happiness, having your dreams come true. I know plenty of people who make a career out of complaining and seem to enjoy it very much.
(in The Career Clinic by Maureen Anderson)