To reform the entire society - APEX
"Life for me ain't been no crystal stair" shows that the mother didn't have an easy life and had to work hard at everything.
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Atticus Finch believes that Mrs. Dubose is the bravest person he knows.
The effect of foreshadowing in Shakespeare's Macbeth creates a sense of tension and a slight sense of dramatic irony as many characters in the play are oblivious to their fate whereas the audience may know what is going to happen.