The poem "A Dream Within a Dream" by Edgar Allan Poe describes standing on a shore holding grains of sand that slip through one's fingers and are lost to the sea, despite attempts to hold on tighter. The analysis suggests this represents trying to achieve dreams and desires in life that are delicate and difficult to attain despite our best efforts, as with the waves taking the sand. It notes we often have "dreams within dreams" about whether we can achieve our goals.