Institutio Oratoria

My own teachers used to prepare us for conjectural cases by a form of exercise which was at once useful and attractive: they made us discuss and develop questions such as

Why in Sparta is Venus represented as wearing armour?

Why is Cupid believed to be a winged boy armed with arrows and a torch?

That certain topics such as the question as to

This practice— for I am not going to postpone expressing my judgment on it—I used to regard a confession of extreme weakness. For how can such men find appropriate arguments in the course of actual cases which continually present new and different features? How can they answer the points that their opponents may bring up? how deal a rapid counterstroke in debate or cross-examine a witness? if, even in those matters which are of common occurrence and crop up in the majority of cases, they cannot give expression to the most familiar thoughts except in words prepared so far in advance.

And when they produce the same passage in a number of different cases, they must come to loathe it like food that has grown cold or stale, and they can hardly avoid a feeling of shame at displaying this miserable piece of furniture to an audience whose memory must have detected it so many times already: like the furniture of the ostentatious poor, it is sure to shew signs of wear through being used for such a variety of different purposes.

Also it must be remembered that there is hardly a single commonplace of such universal application that it will fit any actual case, unless some special link is provided to connect it with