John Keats’ ‘Ode on a Grecian Urn’ expresses the idea that

Explanation

In the poem, Keats reflects on the timeless nature of art, symbolized by the Grecian urn. The urn preserves an image of eternal beauty and perfection, untouched by the passage of time. The idea that "life is long, art is longer" comes from the notion that while human life is fleeting, art—capturing beauty and meaning—endures far beyond the lives of those who create it.