We can't be human without God. That's what Christians believe. We believe that this human life is great gift and every part of it is designed by God and is therefore means something, that every part of it is blessed by God and therefore to be enjoyed, that every part of is accompanied by God and is therefore workable.
We can't get away from God: he's there weather we like it or not, whether we know it or not whether we like or not. We can refuse to participate in God; we can act as if God weren't our designer, provider, and covenant presence. But when we refuse we're less; our humanity is less. Our lives are diminished and impoverished.
And the David story is the most complete, detailed rendering of God-dimensioned humanity that we have, the common life that God uses to shape humanity to his glory. As the story develops we see everything about us inter penetrated with God; our imaginations expand and we see what it means to live largely, aware of God's grace and beauty in every detail of which we're invited to participate in.