Analysis 

This poem is about the dream of an equal and peaceful world with all races, religions and ethnicities together as one. Langston Hughes is trying make it very to the reader that this dream cannot be forgotten or put aside. He is trying emphasize the fact that this dream must not be deferred, but that it must be chased and chased until a day comes where the whole world is in harmony.

Keep pushing yourself - what does he think might happen if dreams aren't pursued? Is this possibly a warning?