Rhetorical Question

In Langston Hughes' Dream Deferred, he uses a lot of rhetorical questions to make the reader think.  Many of the initial choices presented seem to be disgusting ends to the life of a dream.  But when he says, "or crust and sugar over- like a syrupy sweet?" (Hughes) he adds a new idea.  Could the dreams die and there be something positive or good that comes from it?  If an idea was a good initial idea, and possibly led to good actions, then it should be considered good even though it was not completely followed through with.  Some dreams, though, could lead to bitterness and regret.  If a dream is not properly gone after, the dreamer could think about their mistake for the rest of their lives, as the regret slowly dies with them.  Another thought is that it could possibly be literally a dream while one sleeps.  The dream could be one that is very bad, and after the sleeper is awake he continues to think about the dream until it slowly dies.  Yet some dreams could be pleasant, and as the sleeper awakes he may be glad or peaceful about the dream.