In over 30 years of training horses and training people to be horse trainers, I've discovered an amazing secret.
Horses can read people's minds.
As sure as the sun's going to rise tomorrow, if you believe a particular horse is dangerous, he will be. If you believe a particular horse is stubborn, he will be. If you believe a particular horse is a problem because he was raised wrong or handled badly by a previous owner, he's definitely going to give you a hard time. So the moral here is that when you're heading for the barn, be careful what you're thinking because horses will read your mind and will give you what you want. Successful horse trainers always look positively at the horse they want to control.