Answer: to describe the disposition of the person the statue portrays
Explanation:
These are lines from the poem, ''Ozymandias'' by Percy Bysshe Shelley which speaks of a statue of Ozymandias that has now fallen with the two legs being the only remaining standing feature and the head next to them, half buried in sand.
The lines above relate to the features and expression on the face of the statue and serve to describe the disposition of Ozymandias who, judging by the statue, have a commanding expression about him.