MOST OF THE ARTS ACHIEVE THEIR OWN ENDS.
Architecture and the fine arts, fulfil themselves in such an object. Medicine, agriculture and similar professions, however, are auxiliary arts, and obey the laws of nature, assisting their efficient production so as to make them as natural as possible. As to rhetoric, music, and other arts of refinement, which serve the education of souls in improving or degrading men, it remains an open question how many there are of them, and what power they possess. In all these things, we will have to examine what may be of use to us for the questions we are treating, and we will have to discover the cause of the facts, as far as possible.