What is hyperbole in ozymandias?

The ironic theme that emerges in this poem is that the statue represents a man who was a powerful and proud king. However, the metaphor of the ruined statue reminds the reader that both he and his kingdom have passed away, leaving the only reality: a shattered symbol, and even this will disappear under the shifting sands of time. Inferred in this theme is the certainty of our own passing into worldly obscurity.

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The fleeting nature of power and glory finds its most powerful expression in irony, and is found scattered through all the arts, in all times.