Labeling rhetoric as ἀγαθός (good) or κακός (bad) might appear subjective. The Jesuit rhetorical tradition suggests otherwise. Once I place the pursuit of eloquentia perfecta within the context of ancient rhetoricians: Socrates, Gorgias, the author of Dissoi Logoi, and Quintillian, I attempt to find a definition for ἀγαθός λόγος (good speech/rhetoric).
Wells, Andrew J.
"Good Rhetoric from the Classical to the Jesuits; or On αγαθός λόγος,"
The Criterion: Vol. 2018
, Article 8.
Available at: https://crossworks.holycross.edu/criterion/vol2018/iss1/8