Answer:

This song is about finding yourself through God and realizing how important you are to him. "Who am I, that the Lord of all the earth would care to know my name, care to feel my hurt", it's saying that we believe that we're so um important compared to God that he is so great, so holy, how could someone so high up care about little me? But he does because of his unconditional love for his creation, for us. "Not because of who I am, but because of what you've done. Not because of what I've done, but because of who you are."

We are loved, like a father loves his child and we are God's children