G.Steinbrecht

As the blind person touches the object before him very softly and lightly with his fingertips in order not to interfere with the work of the sensitive nerve ends by too much pressure, so it is the rider's first obligation to keep soft and natural those parts of his body with which he feels his horse. If his seat meets this requirement, he will soon feel the movement of the horse's legs and will be able to distinguish each individual one; he will thus have the means at his disposal with which to control them as if they were his own.
G.Steinbrecht (1884, in: 1995, 13).