"Do not try to correct the gait by practicing the same gait. Look for the underlying reason for the disobedience, which we always find in an insufficient flexibility of a body part. We determine which one it is and improve it with the appropriate exercises. Very often we will be happy to see that a horse who seemed very spoilt becomes obedient with little effort on his or on our part, whereas thoughtless actions would have added him to the number of truly vicious horses. On the other hand, there will be many cases that require more time to correct than some horse owners believe, depending on how easy or difficult it is to remove the cause."
(Ernst Friedrich Seidler, 1846)