How ould you interpret lines 28 -30 in Ode on a Grecian Urn?

Lines 28-30 of "Ode on a Grecian Urn" express the idea that beauty is eternal and will never fade, unlike the fleeting nature of human existence. The speaker admires the timeless beauty depicted on the urn and contrasts it with the impermanence of mortal life. The urn becomes a symbol of permanence and a source of solace in the face of mortality.