There's a song by the David Crowder band that talks about God's holiness. It starts out with the lyrics: "I am full of earth/You are heaven’s worth/I am stained with dirt, prone to depravity/You are everything that is bright and clean/The antonym of me." Yet, we are called to be holy. So how can we possibly achieve something so "bright and clean," when we are "stained with dirt"?