Our perception of the world is not as detailed as our horse's. Our horse sees everything, we see much less. Our horse must filter every detail of his surrounding through his instinct, which can cause some friction be the human and the horse. What the human needs to understand is, the horse's perception is the one that matters in your relationship. You cannot make your horse see the world through your eyes, so you must make the effort to interact with your horse from within their perception.