Self-fulfilling prophecies can be a pain in the ass, depending on what kind they are. I’m sure there are positive or good prophecies out there, but it seems like the only ones I’m ever involved with or see for myself are the kind where you set yourself up for failure, then end up failing. Think of it as negative visualization. I’m guilty of doing it to myself more times than I can count, mostly related to dieting. I convince myself that there’s no way I’ll lose any weight, even though I’m exercising more and eating less, so it doesn’t matter what I do. I’ll go have some fast food or something and find I’ve actually gained a couple of pounds, when I go to weigh myself later on. I think most people are, as the title suggests, their own worst enemy. No one can derail your plans anywhere near as well as you can.