Quintilian

Quintilian has justly observed, that the obscurity of a writer is generally in proportion to his incapacity.

Allegory in the sense of Quintilian as a trope, an extended metaphor, Wilson mentions only once.

The civic fragment finds its highest expression in Quintilian, the super-civic in Plotinus.

It was probably his rules for rhetoric and poetry that Cicero and Quintilian had in view.