What is the meaning of Lucille Clifton's poem "the garden of delight"?

This poem suggests that earth experience in the "garden of delight," which is partly Eden and partly the earthly experience generally, may be of the four elements. It may be stone, which in this poem is an image of a bare buttock. It may be water, washing strongly into open mouths. Fire or air are the other choices. Some experience earth as a collection of syllables that, taken together, make up an ineffable something that they long for and search all their lives for. Finally, some people know earth experience as a test.