Final answer:
The simile in line 40 highlights the contrast between 3) two distinct perspectives of the world, emphasizing differing perceptions and experiences.
Step-by-step explanation:
In line 40 ("like . . . armed"), the speaker uses a simile to draw attention to the contrast between two distinct perspectives of the world. This literary device highlights the difference in how individuals perceive and interact with their environment and circumstances. For example, a simile comparing a low wall to a screen in front of marionette players suggests a contrast in transparency and perspective in viewing the truth or the idea of good.
Similarly, in historical contexts, such as the Northern and Southern attitudes toward slavery or the changing perceptions of warfare due to new technology, similes and analogies might be used to compare the differing views and experiences of people. The text reflects the writer's intent to challenge or meet conventional expectations in rhetorically effective ways, indicating that the simile is employed to create a deeper understanding of the subject matter.