* "The Clod and the Pebble," which includes the lines "To see a World in a Grain of Sand / And a Heaven in a Wild Flower / Hold Infinity in the palm of your hand / And Eternity in an hour." These lines are often interpreted as a meditation on the power of imagination and the ability to find wonder in the mundane.
* "Auguries of Innocence," which includes the lines "To see a World in a Grain of Sand / And a Heaven in a Wild Flower / Hold Infinity in the palm of your hand / And Eternity in an hour." Like "The Clod and the Pebble," this poem celebrates the power of imagination and the interconnectedness of all things.
It's possible that you are thinking of a different poem or a misremembered title. If you can provide more context about what you are looking for, I can help you find the right poem.