What to him are Plato and the swing of Pleaiades means?

"Plato and the swing of Pleiades" is a phrase from the poem "Sunday Morning" by Wallace Stevens. It symbolizes the contrast between the philosophical and intellectual pursuits represented by Plato and the natural beauty and simplicity represented by the Pleiades constellation in the sky. It suggests a tension between the human desire for knowledge and the appreciation of simple, natural pleasures.