How can rhetorical comparisons be used in persuasive writing?

Rhetoric usually works through the emotive, or rhetorical force of words and phrases - the emotional associations they express and elicit. Rhetoric is used to influence our beliefs and attitudes. In fact, rhetoric can be more effective than argument when it comes to influencing someone’s belief’s and attitudes. But it shouldn’t be. Rhetoric may be psychologically powerful, but by itself it establishes nothing.