Why?

Yesterday I saw a movie on the Milky Way. I was overwhelmed at the complexity and beauty of the 'night sky'. It said that the number of stars in our galaxy is the same as the number of grains of sand on all the beaches of the world. Now that is more than I can take in.
So the question that bubbled up in my heart is the same one the David asked thousands of years ago.
" What is man that you( God) are mindful of him?"
We are at best a tiny microbe in comparison to the universe and yet God says He cares about me and He carries me close to His heart. He chose me, adopted me, poured His grace in me, redeemed me and forgave me.
I don't get it but I am ever grateful.