The curfew tolls the knell of parting day, The lowing herd wind slowly o'er the lea, The plowman homeward plods his weary way, And leaves the world to darkness and to me.
Why it works
Gray uses ABAB rhyme in iambic pentameter—a deliberate, measured choice that reflects the poem's contemplation of mortality. Take note of how the first three lines gather images of departure (bell, cattle, plowman), while the fourth shifts to the speaker's loneliness. That turn in the final line is the quatrain performing its crucial task: creating a small world and then adjusting the perspective just enough to evoke an emotional response.