You need to praise your horse a lot. It’s how the horse knows he did the right thing. Doing the right thing, so that others are happy with you is more then just a moral behavior. To a herd and prey animal, it’s survival. If you please the other members of your herd, they let you stay and protect you. If you don’t, they drive you away. You can watch horses teach this concept to bratty younger horses. Mares teach it to their foals in a no-nonsense way and older herd members teach the younger ones.