In Francis Chan's book "Crazy Love", he makes a point about the holiness of God and of the sometimes posture of every day "Christians".
He says, " It's easy to fill ourselves up with other things and then give God whatever is left. Hosea 13:6 says , "When I fed them, they were satisfied; when they were satisfied they became proud; then they forgot me."
"God gets a scrap or two only because we feel guilty for giving him nothing."
Francis says, " God is holy. In heaven exists a being who decides whether or not I take another breath. This holy God deserves excellence, the very best I have.