Institutio Oratoria

Therefore, our orator will not suffer the complaints of our allies, the death of friends or kinsmen, or conspiracies that threaten the common weal to go unavenged, while his conduct will be governed not by a passion to secure the punishment of the guilty, but by the

desire to correct vice and reform morals. For fear is the only means of restraining those who cannot be led to better ways by the voice of reason.