In this excerpt from “Ode on a Grecian Urn” by John Keats, which parts reflect the theme that art is immortal? Heard melodies are sweet, but those unheard Are sweeter; therefore, ye soft pipes, p

In this excerpt from “Ode on a Grecian Urn” by John Keats, which parts reflect the theme that art is immortal?

Heard melodies are sweet, but those unheard

Are 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 leave

Thy 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!