Rhetoric is the art of persuasion, the usage of the well-crafted language and trained logic to achieve the highest grade of the discipline. It emphasized arrangement of words and phrases, the importance of style and the technique of delivery. Rhetoric was held in high regard in Ancient Greece, crafted and polished by early philosophers like Plato. During the Medievals and the Renaissance a school of philosophy formed in this style became known as Neoplatonism.
Rhetorica is shown as an armored woman (yes, I know that it looks like she had a beard...), holding a sword to symbolize the power of a sharp word and accompanied by two cherubs blowing the bugle in her honor.