OK, we know we're not the first ones to compare poetry to music, but you can't read three lines of "The Weary Blues" without tripping over something related to music. Music is a metaphor for those abstract feelings that we just can't say straight out. Blues and jazz are all about expressing those complex emotions through sound and tone. Langston Hughes beefs up the musicality by using a lot of internal and end rhyme, alliteration, consonance, and assonance. He also chose a lot of words that sound like what they describe.