Why would the poet describe the Green Knight as both huge and graceful? Ghastly and opulent? What effect does this use of paradox have on our perception of the Knight?

Through the paradox, we come to see the Green Knight as more than a frightening intruder..... the description is positive and negative, leaving us to wonder exactly what kind of man he is. For example..... think of a woman who is descibed as beautiful but cruel..... we can imagine the facets of her personality but are left curious as to exactly what they mean. The Green Knight..... for all of the adjectives used to describe him..... remains a mystery.