In Thomas Gray's "Elegy Written in a Country Churchyard" the speaker imagines that the people buried there were once humble and unknown villagers, whose lives might have been full of rich promises. However, the speaker suggests that, in the end, the rich and the poor are alike: "And all that beauty, all that wealth e'er gave, Awaits alike th' inevitable hour. The paths of glory lead but to the grave."
This is a simile as it compares two things using the word like. It compares her running across the grass to a cheetah chasing its prey, implying she is running very fast