《孔子家语·执辔》
因此，善于驾驭马的人，端正身体揽好缰绳，使马均匀用力，让马齐心一致，即使走曲折婉转之路，到何处都随心所欲。
是故善御马者，正身以总辔，均马力，齐马心，回旋曲折，唯其所之。
Therefore, a person who is skilled at controlling a horse sits upright and holds the reins tightly. They use equal force and make the horses work in unison. Even if the path is winding, they can go wherever they wish.