If you do it you can, if you don’t you can’t, management trainer suggests

 I came across this phrase just recently and it took my fancy. It suggests that if we think we can do something we will, thereby showing we could and did; and if we think we can't do something we won't, thereby showing we couldn't and didn't. Some years ago I wondered if I could walk a half marathon – it seemed such a large distance – however, I thought I could do it and did so. A year or so after that I wondered if I could walk a full marathon and thought I could, so I did; now I've committed myself to walk 800 kms over 31 days and know I can do it and will do it. The journey towards any action starts in the mind and the body follows…and it is only by doing that you find you can do that and a whole lot more.