Perhaps the carol’s simple language only enhances its beauty, conveying complex theological ideas without obscuring them; it becomes transparent, you might say. The image in the last verse, of Christ entering the world through Mary like the sunbeam passing through the glass, is a very common simile in medieval literature, and one that I’m fond of (compare this carol, and this poem). The attribution to St Anselm is not strictly accurate, in that the image doesn’t appear in his works, but it was ‘a simile much used in the school of Anselm’, according to R. W. Southern.
Read it all from Eleanor Parker.