I believe it works too. Some people with multiple personalities are able to manifest medical problems that are separate and distinct to each personality. I've also heard stories of people who've died solely due to their beliefs, when in reality there was no reason for it (such as freezing to death when the temperature wasn't cold enough). There's also a whole quantum physics aspect to it that supports that line of thinking.
But I think that actually getting it to work in your favour is really hard to do. If you have any doubts at all, you're not likely to see any changes. How you really feel is what gets conveyed to your body, not just the words you say.
Even if you spend a few minutes imagining and telling your body what to do, if you spend the rest of the day in disbelief...well, that just negates it! And the whole idea of it is hard to believe without proof. I think that's why there aren't a lot of verifiable success stories out there.
But I think that actually getting it to work in your favour is really hard to do. If you have any doubts at all, you're not likely to see any changes. How you really feel is what gets conveyed to your body, not just the words you say.
Even if you spend a few minutes imagining and telling your body what to do, if you spend the rest of the day in disbelief...well, that just negates it! And the whole idea of it is hard to believe without proof. I think that's why there aren't a lot of verifiable success stories out there.