Aristotle, and W. Rhys Roberts. Rhetoric. Mineola, NY: Dover, 2004. Kindle Electronic Edition.
Book III, chapter 4.
Here Aristotle distinguishes the simile from other metaphors. A simile is a type of metaphor but using “like” or “as” in the comparison (Aristotle III.4, B. 1406b). Aristotle gives numerous examples from famous authors.