You ask the horse for its cooperation. Its good will to trust you that you will not force it to do anything it doesn't want to. To trust that you as the herd leader know what you're doing. And that trust can be revoked at any given time. That's not control. That's cooperation. It's the difference between advising and ordering about. To think you have control would be a big mistake as it would imply the horse will *always* follow your lead no matter how stupid an order you give it.