Institutio Oratoria

Consequently Aristotle in the second book of his Rhetoric has made a careful examination of all that commonly happens to things and persons, and what things and persons are naturally adverse or friendly to other things or persons, as for instance, what is the natural result of wealth or ambition or superstition, what meets with the approval of good men, what is the object of a soldier's or a farmer's desires, and by what means everything is sought or shunned.

For my part I do not propose to pursue this subject. It is not merely a long, but an impossible or rather an infinite task; moreover it is within the compass of the common understanding of mankind. If, however, anyone wishes to pursue the subject, I have indicated where he may apply.