This passage is more about government and injurys
On page 10, Gwendolen meets Jack for the first time, who introduced himself as Ernest. Gwendolen says: "The moment Algernon first mentioned to me that he had a friend called Ernest, I knew I was destined to love you." This is an example of how Oscar Wilde makes women seem picky and naive.
On page 16, Algernon says that "The only way to behave to a woman is to make love to her, if she is pretty, and to someone else if she is plain." This is a perfect example of how Wilde makes men look like pigs.
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I'd say the answer is 'the visible is more dangerous than the invisible', because Duncan never suspected that his faithful Macbeth would be the one to kill him.
