“Here should be inserted a word especially for equestrians, because the above truth, which is perfectly obvious to all other animal trainers and utilizers, most often seems to escape riders. At least, they generally behave as if they were unaware of it. Since they are in direct physical contact with the horse and communicate tactile sensations to it through the use of their muscles, they are easily taken in by the utterly false illusion (which is all the more convincing to them because it seems to be verified by certain superficial effects), that they act directly on the horse’s body through force, and thereby obtain a sort of mechanical response.”