Final answer:
In John Keats's 'Ode on a Grecian Urn,' the speaker notices images of a lover's chase and a ritual sacrifice, both of which encapsulate eternal beauty and truth.
Step-by-step explanation:
On the Grecian urn depicted in John Keats's poem "Ode on a Grecian Urn," the speaker notices several specific images that are frozen in time. Two prominent images that the speaker observes are of a lover's chase and a ritual sacrifice.
The first image involves a young man chasing a beloved, caught forever just before the kiss, thus symbolically preserving their love and anticipation eternally.
The second image captures the moment before a ritual sacrifice, with a priest leading a heifer to the altar, reflecting a scene full of piety and ceremony. These images are meant to be representative of the eternal beauty and truth that survives time, as encapsulated in the famous ending lines of the poem: 'Beauty is truth, truth beauty, that is all / Ye know on earth, and all ye need to know.'