Lots of Tiny Rocks

Phenomenal things happen sometimes in the most miniscule places. Consider granules of sand. These tiny pieces of rock span the world. Sand is in everything we are exposed to. On the cleanest places on earth, you might find a grain of sand. This is merely a teaser to get you thinking. What is the purpose of the grain of sand on this earth in comparison to the human being? Will you answer with superiority or general humbleness? Until next time...