Institutio Oratoria

It is not always the duty of generals in the field to lead their armies through flat and smiling country: it will often be necessary to cross rugged mountain ranges, to storm cities placed on inaccessible cliffs or rendered difficult of access by elaborate fortifications. Similarly oratory will always be glad of the opportunity of manœuvring in all its freedom and delighting the spectator by the deployment of its full strength for conflict in the open field;