"Dream Deferred"- Similie

"Dream Deferred" by Langston Hughes is a confusing poem with many similes throughout.  One examples would be when the speaker says, "Does it dry up like a raisin in the sun?"  This line is comparing a dream that did not come true to a raisin drying up in the sun.  I think the speaker is asking, "Does the dream just vanish when it first does not come true?"  "Should one give up on their dream when this happens?"  One other thing I noticed throughout the poem was that the author compared the dream to food much of the time.  In my opinion, one should never give up on their dreams.  People need to always persevere!