In the poem "Dream Variations" by Langston Hughes, why does the idea of whirling and dancing have power? What does it symbolize to Hughes?

In Hughes's poem, he speaks about stretching his arms wide during the day. He writes, "To whirl and to dance / Till the white day is done. / Then rest at cool evening." This is a poem about dreams, and whirling and dancing are powerful ideas in this poem because they express his desire to be free and express himself fully. However, because Hughes is a black man, he does not have the ability to express himself fully during the day or expand his arms wide, literally and figuratively. His days are likely spent working, and he lives in a society that does not always allow him to whirl and dance. When he cries, "Dance! Whirl! Whirl!," he is expressing his dreams rather than reality. These actions symbolize what he feels a black man can't do in America--that is, to act with freedom, creativity, and abandon.