Institutio Oratoria

The question has been raised as to whether we should deal first with persons or motives, and different orators have given different answers: Cicero as a rule prefers to treat motives first. For my own part, if the circumstances of the case do not point strongly in either direction, I consider that the most natural course is to begin by dealing with persons. For the enquiry whether any crime can credibly be imputed to such a man as the accused is of a more general character than the question whether some one particular crime can be imputed, and in addition involves a greater correctness in division.

Still, in many cases expediency may make it desirable to reverse the order. Further, we have to seek not merely motives affecting the will, but also causes leading to error, such as drunkenness or ignorance. For just as such considerations lessen the guilt of a crime when regarded from the point of view of its quality, so they tell heavily against the criminal as