2 Answers | Add Yours
In poetry, the language is loaded with imagery. A cup holds things, as does the sky: clouds, rain, lightning, the sun etc. Deep blue would be describing the shade of blue the sky is reflecting from Earth's waters. Morning tends to be a pale blue while later in the day, the shade would deepen. Poets want their readers to see through the writer's eyes; so, they appeal to visual images. At times, they may use a sound imagery like onomatopoeia or alliteration, but this is not the case in the particular line you quoted.
Can this possibly refer to the Holy Grail?
We’ve answered 319,195 questions. We can answer yours, too.Ask a question