Is it "not believing in oneself" or is it "life takes unexpected turns and you don't always end up where you thought you would"?

I don't think it's about not believing in oneself. I actually think the opposite is a requisite -- that you must believe in yourself, even if you don't know where you're heading. Or even if you know where you're heading, and it's not the path that you had originally charted. You can't see 20 moves ahead, but you know a good next move.

I don't think people would even try something in the first place if deep down they didn't believe it could work out.