 Frye uses the terms 'centripetal' and 'centrifugal' to describe his critical method.Criticism, Frye explains, is essentially centripetal when it moves inwardly, towards the structure of a text; it is centrifugal when it moves outwardly, away from the text and towards society and the outer world.Lyric poetry, for instance, like Keats's "Ode on a Grecian Urn", is dominantly centripetal, stressing the sound and movement and imagery of the ordered words.