I don't know if this is why everything has worked so well and I'm not sure I'd recommend this kind of thinking to anyone else, but I've always known I'd be successful in acting. I have certainly worked for it.
I would love to act. I probably won't make it to Hollywood at 42 years of age, but I'd love to act.
You must accept that you might fail; then, if you do your best and still don't win, at least you can be satisfied that you've tried. If you don't accept failure as a possibility, you don't set high goals, you don't branch out, you don't try - you don't take the risk.