You may observe in all my lessons, that I tell you how the legs go, and those who are unacquainted with that, are entirely ignorant and work in the dark.
But we ought to consider the natural form and shape of a horse, that we may work him according to nature.
Use gentle means before you come to extremity, and whatever lesson you work him, and never take above half his strength, nor ride him till he is weary, but a little at a time and often.