Thou foster-child of silence and slow time,

from John Keats – Ode on a Grecian Urn on Rap Genius

Using a different metaphor this time, the urn has been adopted (get it? like a foster-child?) by “silence” and “slow time”.

It no longer exists in the original circumstances in which it was created, back by some artist during Greek civilization. Because it is made of stone, the urn is essentially an eternal piece of art, exempt from the effects of time. By transcending this limitation, the urn has the ability to tell its story at any point in time, though it has been tucked away in “silence” (perhaps in a museum or some private collection, unable to tell its story) until now.

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