Answer :
The answer to this question is entirely up to interpretation, but I would say it's these lines from the poem. Unfortunately you didn't post the whole thing!
Oh, morning, at the brown brink eastward, springs —
Because the Holy Ghost over the bent
World broods with warm breast and with ah! bright wings.
Oh, morning, at the brown brink eastward, springs —
Because the Holy Ghost over the bent
World broods with warm breast and with ah! bright wings.