How do you help a horse not rush at the canter? How do you help a horse that bolt out of a trailer? How do you help a horse that spooks on a trail ride?
A horse is always trying to do what it is thinking. So when a horse thinks to do something you want, it looks like you did nothing. There is no more important principle in good horsemanship.
I have horses because I like them. I ride and teach because I like horses. I trained horses for people for many years because I like horses. I see them either as friends or as friends-to-be that need help.