Read the passage from "Ode on a Grecian Urn."Heard melodies are sweet, but those unheardAre sweeter; therefore, ye soft pipes, play on;Not to the sensual ear, but, more endear'd,Pipe to the spirit ditties of no tone:Fair youth, beneath the trees, thou canst not leaveThy song, nor ever can those trees be bare;Bold Lover, never, never canst thou kiss,Though winning near the goal—yet, do not grieve;She cannot fade, though thou hast not thy bliss,For ever wilt thou love, and she be fair!