What does this refrain mean-How can beauty be terrible-How does the “birth” of this beauty mark a profound change?

Easter 1916 For your “Easter 1916” response paper, write a short (2 ½ page paper with Works Cited on page 4 our later) in MLA format in response to required prompt: “Write a [2 ½ page] response paper considering the significance of the famous refrain ‘a terrible beauty is born.’ What does this refrain mean? […]